I'm still using the same cheap wireless keyboard that came with my HP Pavilion d4100e several yrs ago. I guess it at least has longevity going for it, the crappy wireless mouse HP provided had to be replaced yrs ago after it began insisting on new batteries every day of the wk - literally.
If you're interested in more qualified opinions (from the editors more so than shmos like me, the users) these 2 sites are very good for ratings/reviews of electronics, PCs, PC peripherals etc.
www.cnet.com http://www.pcworld.com/
So, which keyboard are you using and why did you choose that particular one?
Regards
Hydra