iRobot Roomba 3000 Robotic Cleaner

Although it actually does a decent job of collecting debris, my experience with this device led me to send it in for service 2 times. After the second time, I put the repaired unit up for auction. For both incidences, the problem I had was that it would continously go around in circles after a few usages. I had opened and cleaned every possible filter, container, and brush that is accessible to the user yet somewhere there was something prohibiting it from working properly. The other negative factor is that there is no way of vacuuming stairs with this unit. Either way you still have to pull out the regular vacuum to complete the job so why bother ? Like others have said, it's a novelty and a conversation piece.