Mine is about a 15 year old Blackburn mag trainer. There was a dry spell of about 6 years or so. The drag is hard to adjust so its more or less stuck at one load.

If you want a more realistic resistance go with a fluid trainer. One downside is, I've heard one person whose fluid unit leaked. Other than that, I think its a lot better than a mag unit.

Roller is good too because you have to maintain your balance. Downside is you can't ride hands free.

I've heard lots and lots of good thing about Cyclops fluid trainer. I haven't heard anyone who hates it.