We have one. Hate it, don't buy this. Keys are not backlit. Signal reception is an issue as little as 8 feet a way with the USB receiver in the front of the HTPC (line of sight).
You can't look at the keyboard and look at the screen at the same time. This makes dealing with the signal reception drops extremely frustrating, especially when typing, and especially when it's a password. "Which key are you on? Which key did it fail to detect? Hope it's the one you just pressed. Woops, wrong password, guess it was one of the 7 keys before it."