I rode aboard the Acela today NYP to Boston and back, hit 150 mph on both runs, ran close to schedule, found the trains to be full (sold out in fact on the way up) and in good shape. The equipment certainly doesn't look or feel bad from a passenger perspective yet, tilt system seems to work well, but of course you want a high speed train to be in a state of good repair until the end, not retired because it's only a few runs from falling apart!