Too bad it is ruined by being wireless so it needs charging, I don't want to think about charging basic stuff...
I have two K800 keyboards (one at home and one at work) and they are the best keyboard I've ever used. Saying it is ruined because it is wireless makes no sense at all; the wireless is an OPTIONAL feature that you don't have to use if you don't want to. Just leave it plugged in all the time and --surprise!-- it will behave like a wired keyboard. I use it wireless, and honestly I charge it less than once a week; it is remarkably power efficient.
As an aside, it turns out I have very limited use for an illuminated desktop keyboard; they are extremely useful on laptops, just not so much on a desktop with a 24" bright glowing screen towering above it, or in an office surrounded by fluorescent light. Regardless of that, the K800 itself is an absolutely fantastic keyboard that is supremely comfortable to use for extended periods.