I bought a rumba from Irobot and it only workede once and never worked. I have called about 5 times to the call center and the call center's agents english is horrible and they just keep giving me the run around. They won't transfer me to a manager or supervisor and I end up waiting to speak to a rep for about 45 min. and after I get to talk to them it takes another 45 min. to explain a 2 sentance problem because the don't understand english. DO NOT BUY AN IROBOT. Not worth the money and you will not receive help from the call center.