I'm not looking to do serious training with hours and hours of indoor intervals, so I really don't want an expensive trainer. I just want something to help me keep up my fitness level during the winter and maybe practice riding at a higher resistance. I've found two magnetic trainers at really good prices. They've got pretty good reviews, but before I take the chance with one I thought I'd check whether anyone here has ever tried either of them:

Ascent Adjustable Mag Trainer $100 through Amazon, though it's also on sale right now at the Evil Empire (Performance) and I got a 20% off coupon in the mail for this weekend's sale.

Bell Motivator Mag Trainer $80 and free shipping.

Think either of them is worthwhile?