We had one that came with our IBM Aptiva. It wasn't one of the clicky ones that people go on about. Much softer and quieter, but it still had very sure keystrokes and a great feel to me. I believe I used that one through high school, college, and most of grad school before it finally gave out.

Have a logitech S510 now. It is fine, but mostly just happy with its consistent wireless performance and negligible battery use.