This was better than most mechs I have tried out in the $100-140 range and has, IMO, the perfect 68 key layout.Bluetooth:Worked flawlessly in setting up, and is a quick transfer between the three devices I have attached to the keyboard (Function 1 +Q, W, and E keys to toggle between your chosen devices).Hardware Design (frame and kickstand):I got the PLASTIC frame for this board, and the board has ZERO flex. Solid as granite.Saved 20 bucks by not going aluminum (nor RGB) and taking the plastic frame, hot-swappable, regular white backlit version. Glad I did so as I also can't stand RGB on keyboards, and don't even want it there. The plastic is also a bit lighter than aluminum, which I like. Can carry this board all around the house and pack it into my backpack for trips to the local cafe :-)The kickstand feet are incredible -- I prefer the highest of the three settings, and don't consider the keyboard to be "too high" at all. Love the natural upwards slant of the key rows and I can't even go back to the medium height of the board, I've become so well-adjusted. Some reviewers complained about it being too high, but I think it's ergonomics are spot-on -- most other keyboards, even mechs, are too low for the most natural feeling.Key Layout:I like having a dedicated button in the top-right for the backlit keys (15 different settings), as well as NOT having that useless insert key.There are two function keys on the bottom instead of the function row up top and a smaller right shift to make the layout nice and condense. For those that like mastering what the Function keys can do in conjunction with all the other keys, it is a delight to only use two function keys while also saving space without that dedicated function row. Frees up some of that ever precious Desktop Real Estate ;-)I consider the Cap Locks key and the right-hand ALT to be pretty useless, but try finding a non-customized keyboard without those two.You can also remap keys, but not yet with Keychron software -- you'd have to go third party. Apparently Keychron is working right now on their own software to make it a bit easier to reprogram keys on their boards, but third party software for doing so is free and easy to begin with.I also use the 4 arrow keys and the Home, Page Up, and Page Down buttons a LOT more than I thought I did, and my guess is so do most people -- glad these are all dedicated keys.Charge:Battery life is pretty stunning, especially when the keyboard shuts off after ten idle minutes, and only requires one key press to turn back on.For every three days I use it wirelessly, it only takes three hours with the USB to fully charge again (and I'm sleeping or still working with the keyboard while it's doing so).The USB cable is pretty sturdy and hefty for an out-of-the-box design, though nothing like the coiled cables that are becoming more and more popular. Even going entirely wired-in would not be that bad with this cable, though it'd be better if it was centered in the middle of the keyboard -- instead it is on the left hand side of the frame. Oh well, nothing's perfect...Modding:It was extremely easy to replace the switches and the key caps as well, on the hot-swappable version. Got the K6 modded out now to my utmost desire. Couldn’t have been more satisfied. The Gateron Reds are now all Silent Box Browns and all 68 keys are working after the swap.Keycaps:The ABS keycaps are pretty bad, though not as bad as some reviews claim -- the oil and residue left behind hasn't been bad at all, so far -- but they DO feel cheaper and sharper and louder than PBT keycaps..And, IMO, the font on them is terrible, as are the multi-media and function labels. I had to strain my eyesight while typing to even make out the yellow multi-media depictions, never mind the almost invisible blue of the function numbers.--------------------------PS: the switch-puller that Keychron includes IS quite awful. It's better than nothing, I suppose, but my advice would be to invest 3-5 bucks into a top of the line switch puller.After I fully swapped out my Gateron Reds for Silent Box Browns, I noticed about 5-6 of the previous red switches had that small little bar snap off on top, which bends inwards when a switch-puller is applied to it. Not bad for me, since I never plan on using those switches again, but it does make the switch a bit more wobbly if you ever put it back on.It's a cheap switch-puller which makes the whole experience quite violent and literally like pulling teeth.The keycap puller is also pretty shoddy, and quite a rough experience, but no caps were broken and only a few flew 2-3 feet away...----------------PPS: tactile gang rise up ?---------------tl;dr -- the best hot-swappable, Bluetooth 5.1, 68 keys mechanical keyboard you can get these days under 100 bucks!!!+ Pros +• Hot-swappable• White or RGB backlighting options• Plastic or aluminum case• Gateron Blue, Red, or Brown switches• Wireless via Bluetooth or wired via USB-C cable• Various lighting styles• No driver software required• Compact size• Relatively light even with steel backplate and battery• Simple typeface font• 4000 mAh battery; lasts for up to 90 hours and recharges in a few hours• Rechargable with USB-C cable• Can be used wirelessly while charging• Windows/OSX layout switch• Replacement modifier keycaps to accommodate for Windows/OSX layouts; also replacement keycaps for backlight key and ESC key• 3-step angle elevation• Connects up to 3 devices• 10-minute auto-sleep function to save battery life- Cons -• Sits a little high; might need wrist rest• USB-C port sits on left side instead on the back like most keyboards do• Thin ABS plastic keycaps; causes that oily surface after prolonged usage• Unique 65% layout when compared to similar keyboards; ergo, it's very difficult to find replacement keycaps that will fit the layout of the keyboard (HK Gaming's keycap sets are perfect for this keyboard)• The Gateron Brown switches that come with the keyboard appear EXACTLY the same as Gateron Silent Browns due to the white switch housing• Not reprogrammable~ Subjective ~• The height can be a plus as some people type with their hands floating above the keyboard• Keycap profile is basically OEM - not precisely but very similar height• If using the hot-swappable version, using black switch housing may cause LED backlighting to not shine through properly even on full brightness; recommended to use switches with white or clear housingFinal Verdict?Even though Keychron's keyboards are mechanical, they are not just for getting that perfect keystroke timing during a match of DotA 2, CS:GO, Apex: Legends, etc; they also have a place in the professional environment. Sure, your co-workers or colleagues may think that you are wrong in the head for spending $80+ on a keyboard when you can just stick with a typical membrane office keyboard or some scissor-switch laptop keyboard, but when they complain about their fingers cramping up because they have to completely bottom out their keyboard while you are typing away at 100+ WPM on your wireless Keychron keyboard at your workstation while being able to text your friend/SO/family all at the same desk, you may want to thank yourself for buying one.For comparison, I work at a position where I am required to talk with clients for a whole 8 hours, 5 days a week. I have Gateron Silent Reds which are a tad bit louder than Gateron Silent Blacks but quiet enough that my client would not hear it constantly from my headset; your mileage may vary on that depending on your headset and its noise-cancelling capabilities. The battery life lasts quite a while even with backlighting on and does not take long to charge even after a full shift - in fact, you can leave it on wireless for the full shift and can last even longer than that; I just charge mine every day after I am done on my shift.... or maybe needs a bit more getting used to - the backlight button layout - I hit that maybe 1 in 10 times when pressing backspace keyExcelente teclado! Se siente muy bien al teclear y el rgb tiene muchas formas de mostrarse o lo puedes quitar, la caja llego un poco golpeada, pero lo importante es lo de adentro, el sonido del switch café es satisfactorio y no es muy ruidoso y el cambio entre dispositivos, no es excelente, pero es bastante sólido la mayoría de las veces.Me gusto mucho el teclado, había comprado otro más caro pero éste es mucho mejor, la verdad pensé que la iluminación se vería muy mal pero la verdad es que se ve genial, tiene un interruptor para cambiar a modo windows yo amé esa funcionalidad por que lo tengo conectado a una mac y a una windows, recomendado 100%El producto funcionó bien durante dos semanas y luego tres de las teclas dejaron de funcionar. Pedí una devolución, pero el vendedor no me da una forma honesta de devolver el artículo.El vendedor me ha proporcionado una etiqueta de devolución falsa para DHL, fui a tres tiendas de DHL y ninguna aceptó la etiqueta de envío. En sus instrucciones dice regresar a DHL.