I have already swapped out all the keycaps on mine, and it was pretty easy. It'll take any cherry MX-compatible keycap. Notice, that if you get thin ABS or white thin PBT, you'll still be able to see the RED LED shining through a little, otherwise, it may be the best to keep the capslock, scrolllock, and windowslock key.
The reliability should be the same as filco, or any other costar-OEM'd board. I don't expect trouble with mine.
Durability should be good as well. There was some concern about the rubberized coating coming off, but this has not been an issue for me. The biggest downside is all the logos.
I spend a lot of time looking at the keys, 'cause it's is QWERTY, and I've never been able to touchtype that. The logos don't really bother me.
Oh, and the USB cable it comes with is really spiffy.