I like mine. I don't use it on our one carpeted room though, only on the hardwood. I find it works best if you use it frequently, and do small spaces at one time (we have a pretty open concept house, so I close it off to smaller 'rooms').
we are on our 2nd roomba in 2 years. i love mine and am amazed everytime i clean out the cartridge b/c it picks up so much stuff. we really use the "electronic walls" b/c we have an open floor plan. they only last a year or so if you use it a lot (every other day).
Re: NTR: anyone have a roomba?