Where do I start with this controversial keyboard…. I nearly chucked it out the window when I was setting it up. But now, it is my holy grail keyboard of all keyboards. I would buy another one instantly, although I haven’t forgotten the rage of set-up (hence the 4 stars only).I needed to find my “Goldilocks” keyboard that was low-profile (both the switches and the caps), white and sleek, gamer RGB LEDs, included the Number Pad keys, and was hybrid wireless. This last point was the most important, and thank goodness this keyboard nailed it all.I wanted to replace my two keyboards, one wired to my gaming PC and a wireless one for my work laptop, with just ONE keyboard. After searching for hours and reading the reviews I got nervous because no one said if they could do this or they just complained about wireless…. But I had to try.Thank goodness I did. I can now switch effortlessly to my laptop, then when I log off for the day switch to my gaming PC with ONE FLICK! No cluttered desk, I get to have a fun RGB LED work keyboard, and the comfortable low-profile keys sound so good I think.Setting up the initial Bluetooth and lights was a disaster that almost made me quit though. My tips: Read all the instructions. Then, realize the instructions were lacking and try random stuff.Tip #1) So for the first pairing, the instructions say flick the wireless switch, then use the (Cooler Master logo key) + Z + X + C. This is WRONG. Apparently, this doesn’t mean hold all four keys down. Nope, the only thing that works is holding (Cooler Master logo key) + Z OR X OR C. Only the two keys. Also, you can’t even access wireless mode pairing UNLESS you connect one time to it wired first and stay plugged in for set-up. So, connect wired first, then flick the wireless switch, press the keys I mentioned to initiate the Bluetooth setup, then select the device on your PC settings when it is finally found, enter the code that flashes on the keyboard after, and you’re done, you can unplug.Another tip: If you want to do a similar set up as mine (i.e. interchangeably for both a laptop and a PC at the same time) you want to wire it to the laptop first so it recognizes, flick to wireless and do the wireless set up, then move the wire to the PC. It should work on both. You MAY have to repeat the wireless Bluetooth to laptop one more time at this step, but don’t move the wire from your desktop. Just flick switch to wireless, do the wireless laptop pairing again, and you’re good. I had to do this “double sync” and was so mad bc I didn’t want to reconnect Bluetooth every time I used my laptop BUT it’s not every time, it was just this once for set up, so don’t worry. Now, I never have to move the wire at all. I just flick the switch and it switches between my devices instantly and it is extremely reliable. Plus, it always stays charged this way.Last tip: You gotta get the (free) Cooler Master lighting software on their website. The built in settings are just too fast, but I was able to get a calm reactive rainbow using the software.All in All: this is the only keyboard out there that makes me 100% happy to use. Maybe, if they added a volume wheel on the next version I would get that too, but otherwise this is the best of the best for my work needs, gaming needs, physical needs, and aesthetic needs.