I really like my Kurt Kinetic Road Machine. Very smooth and quiet. I think it folds up too?

Bright obnoxious color though (slime green). Defintely doesn't blend into MY decor.

Agree that it's pretty boring (probably about the same as a treadmill, maybe even worse), and somehow seems harder than riding outside. Ipod helps. Sadly I don't really have the ability to set my bike up somewhere that I can watch DVDs... but I'm sure that would help a lot. However, it is a good way to get in miles in the winter, and a good opportunity to do drills and such.