I take support calls on the Raven and there are TSB's on the seat switch, on the blades coming off and a couple of others. Service calls come from all over the country so no single service center has them all. One nationwide service center reports problems getting parts from China and tell me they have Ravens in the shop for two months. The Raven was not put on sale until March 2013 so many customers report downtime eclipses uptime. And because it's so new and cutting-edge (LOL) technology, most customers are patient as the Denver, NC company works on solving manufacture and support issues. I am happy to report Lowe's has since removed it from sale and offering consumers refunds or trade-ins for their Raven.