I got the Redragon K551 keyboard for my new PC with Windows 10. I wanted something with back lighting. As I did my research, I discovered that mechanical keyboards existed, and seem popular. So I write this review as someone who had never heard of such a thing until just before buying it. I've been using this keyboard for a week without any trouble. Windows 10 recognized it instantly when I plugged it in. The keyboard came in a box with a small information sheet and key puller, neither of which were needed to connect it to my PC. The keyboard is heavy, much heavier than my previous keyboard that came with my HP desktop. The cord on this keyboard is not braided, but I don't really understand why that matters, having never seen a keyboard in person that had a braided cord.Keys: The buttons are easy to press. They make a loud click, which can be good or bad, depending on whether you enjoy loud clicks. It is certainly good for letting people in other rooms know you are typing. As for the "mechanical keys", it seems like a gimmick. I can feel each click and I get plenty of audible feedback, even with headphones. I can't really say they make typing a better experience than do membrane keyboards, but they are no worse. There is a lot of travel when pressing the keys, and you can repress them without letting them reset.This keyboard has a 10-key number pad, which was an important feature for me. The key layout seems pretty standard. The function keys (F1-F12 using the FN key) are a nice way to get those functions and save space, although I could see some users preferring the dedicated volume and media buttons. Being able to lock out the Windows key is also a good idea.Lighting: It's great. I paid a little extra for RGB, and I'm glad I did. I like the different lighting settings, although I only use a couple of them. They seem plenty bright with and without room lighting, and I like having the ability to pick from a selection of colors, or have multiple colors spread across the keys. I was slightly disappointed because I saw a video review where it was possible to set different colors for individual keys, for example, having the arrow keys stand out with yellow lighting while the rest of the keys are green. That feature does not seem available in the current version. (See edit below!)Gaming: I mostly play flight simulators and driving games. For driving, I prefer a controller. For flying, I prefer the keyboard, and this one does well. I tried using the keyboard for GTA: San Andreas, but I was not so impressed, mostly because of the long travel of the keys that led to inconsistent resets when pressing the same key multiple times.EDIT: I randomly found the answer to the customization per key issue. To enter the customization mode, you use FN plus the ~ key (actually `, but that could be mistaken for ' if I didn't explain). Once there you can use FN plus right arrow to select a color and then each key you press will be that color. As for the key travel and reset issue, I am adjusting to it.EDIT 2: I have not only adjusted to the mechanical keys, I am loving them. Membrane keyboards annoy me now. I never would have expected that to happen. The clicking is a little loud, but I can live with it. In fact, I've edited the rating to 5 stars.