Before I get to the review, I wanted to share instructions that I found to program the lighting the way you'd like - the included instructions are not super clear (or complete), my only real complaint about this keyboard.FN+F11 -- custom color settingPress FN and a number row key (1, 2, etc.) to choose which "saved config" you want. Then Press FN-F11 to engage recording mode. All four indicator lights will be blinking. Press each key to toggle through 7 available colors. When you are finished, press FN-11 to save. In the future, press FN-1, FN-2 etc. to pull up the saved config.FN-F12 -- custom macro. You can set macro to up to 5 of the following keys: Y U I O P. Press FN-12 to start programming, press one of the FN keys to record macros into that, then type your macro, then FN-F12 again to end recording. In the future, call up the macro by FN+Y (etc.).Other keys: Most of these are obvious based on the secondary legend, FN-F1 is multimedia, FN-F2 is play/pause, FN-F3 is stop, FN+F4 = vol + FN+F5 is VOL -, and FN-F6 is mute.FN+PRTSC is full color modeFN+SCRLK is single color modeFN+PAUSE is toggle among 5 modes: single key highlight, scroll, wave, raindrop, reactive typing (to be explained later)FN-DEL -- main region (36 key) backlight on/offFN-END -- water flow lighting modeFN-INS -- reactive lightsFN-HOME-- breathing light modeFN-PGUP -- always on / offFN-PGDN -- side/back light controlFN - LEFT or RIGHT -- adjust speedFN - UP or DOWN -- adjust brightness (3 steps)To "factory reset" the keyboard, press FN+ESC and hold for five seconds.FN+WIN is winkey lock toggleFN-INSERT -- interactive mode toggle among four modes:Mode 1) press a key, and it changes color to the color you selected, and slowly transitions back to the background color. For example, you had keyboard set to blue, special color set to red. You press a key, key turns red, then slowly fades back to blue.Use FN-SCRLCK to change the selected color.Use FN-PAUSE to change the "background color"Use FN-LEFT/RIGHT to adjust the length of time it takes to fade backUse FN-UP/DOWN to adjust lighting brightinessMode 2) Propagate -- from the key pressed, light spreads outward in circle (may be back lights?)use FN-PRTSCN to adjust key and FN+SCRLCK to adjust background colorsUse FN+arrows as above3) Wave mode same as 2) except it's the keyboard lights. Side lights are on full.4) Reacting typing, normally blue. Based on how fast you type keyboard slowly transitions to red based on speed.FN-HOME -- full keyboard "breathing mode"use FN-PRTSCN to engage full color mode or FN-SCRLCK for single color, adjust brightness and speed as needed.FN-PGUP full keyboard light onagain, use FN-PRTSCN (cycle through colors) and/or FN-SCRLCK as well as brightness and speedFN-END -- press once for left to right, again for right to left, use same keys as before.FN-PGDN -- side/back light controlDefault is slow transition of all colors use FN-PRTSCN and FN-SCRLCK as needed, as well as FN-arrows.Review:I wanted a full size keyboard, with round keys, that was backlit and could be set to a single backlight color, and not stuck on RGB mode. This keyboard checks all the boxes, and has a ton of customization options as well!I got the blue switches, but I've seen this offered with red switches too, in case you're looking for something quieter, or less tactile.I love the retro futuristic typewriter look! I've set mine up with a solid yellow backlight, with a wave pattern that ripples out from each key pressed. You can change all of the effect colors as well, including the ripple color (see the attached video).There are a ton of different modes and color options here, and none of the customization requires software to set up - it's all done with key combos. This is a plus in my opinion.I have seen a link for customization software available for this keyboard, supplied by the seller in the customer questions section of this page on Amazon, but I'm using this with Linux and Mac computers, so I won't have a chance to test it out.I have been using round keys exclusively on my last two keyboards - I find I type faster on them, measured with a typing test comparing a sqaure key Vs. round key keyboard that were otherwise comparable.While slim, this is a full size, 108 key keyboard, with a numpad, and it takes up space on your desk. The keyboard is solid too, with some good weight to it. There's a little more spacing between the keys than you might find on many other keyboards, and this may take some getting used to. I'm a big fan of the footprint personally, and feel like I have a spaceship command deck in front of me!I've had this a keyboard for a day, and just had to review it, it's that cool. I'll update this review after putting this keyboard through it's paces over the next few weeks.