My Roomba 580 stopped working in December. I submitted numerous emails requesting customer assistance. After several email exchanges (most were never returned) I called in to tech support. Finding someone that spoke english well enough to understand was a challenge. After consultation with someone else the customer service rep gave me an RMA number to ship the unit back. The Unit was shipped January 13, 2009. On February 4th I inquired about my RMA number via another tech ticket. They indicated they had never recieved the unit and I must... read full review »