I've had this keyboard for a couple days but I'm already in love with it. After reading other people's experiences online I knew I had to update the firmware right away. Also the keyboard didn't connect until I reset via que key combination described in the manual.
Programming the keys seems daunting at first, but now I can do it on the fly very natural. The keycaps are great quality. Brown switches perform as expected.

Super comfortable to type on, it is already helping with my wrist pain. Would give it a 4.5 because of the confusing manual (search online if something doesn't work) and the tenting being non-adjustable. But everything else has been just perfect.