The Roombas are really nice. I bought one off of Woot for $150, the same one that was just on but without the scheduler, and I love it. It amazes me that I can run it everyday and it STILL fills up the canister with dirt. Yikes.
Buuut if I were you, I would spend a little more and buy one of the brand new models. iRobot just came out with a brand new series of Roombas that upgrade pretty much everything about the older model. You can buy the lesser model of the new series for $212.49 with free shipping at the
home shopping network, just use coupon code C56574. For new HSN members only.