I bought a cheap $100 trainer at Dick's which I've actually used the last couple of days because it's been cold in Phoenix and I haven't been getting in my commuting miles.

It's amazing how much more I sweat on that thing than riding outside. I'm sure it's probably the same but I don't notice it outside.

It's absolutely horrible, I just set the retention up all the way so it feels like I'm pedaling through 6" of mud going uphill.