I've got two sets of rollers. The first was purchased in 1993 and is a plastic drum fold up performance set. They were loud and had a hop, but where effective for my needs. For as long as I have owned these, I always thought about replacing with nice (expensive) rollers. In the end, I bought a set of reduced radius aluminum Nashbar rollers 3 years ago when on sale for $100 delivered. The new rollers are smoother and quieter but do the exact same thing as the older set.

I probably average about 20 hrs/yr on the rollers. I prefer, and spend more time on, the fluid trainers over the rollers as I can read while riding. The rollers are nice for working on balance and smooth cadence and for impressing friends with stupid human tricks.