I have lusted after a Festool vac since I used a CT-22 vacuum when I attended a woodworking school several years ago. Well, I found one on sale for a good price and bought it, a CT Midi.
I used it for 10 minutes, with only the upholstery tool on it and it stopped working (virtually no load on the machine). I waited 30 minutes, turned it back on and it ran for 5 minutes and stopped again. I read the manual. The manual states that it has a temperature overload sensor that shuts the motor down if it overheats. I felt the housing of the motor and it did feel rather warm/hot. I returned it. Thought about sending it back for warranty but didn't want to go through the hassle and then have them tell me it was normal.
Kinda disappointed but I still have my Fein mini turbo, 6 years old and has never failed me.