My aunt had one, and my sister and brother in law used it at her house and they liked it so much they bought the same one, and I tried out my sister's machine and I bought one too. It has digital-magnetic resistance so it is smooth even resistance instead of jerky, like the band-tension based ones. The construction is very sturdy (you have to put it together your self, or at least I did). The machine is very quiet, I like to watch TV while I'm on it :)
Proform XP 110 Stationary Bike is recommended by BRAINY33