The french "Armée de l'air" (Air Force) is using TBM 700's since 12 years, and they never managed to break one !
They use it to fly Generals and ministers around the country, so I guess they are reliable.
A Socata test pilot told me that they never had an engine related accident on the TBM fleet.
I am gonna have one soon to fly my boss around Europe, and I will feel definitely safer in this toy at night than in the Seneca we are presently using !