Well SolGTP and I are starting to get up there in mileage on the DDM kits. If you want reliability watch for any threads from us. Something tells me Randy wouldn't post problems though.
I'm at 14,000 miles on mine so far since the add-on. 26,000 total.
One small add-on also, I'm 19. I do not drive this car like most do. I push it daily taking it over 100, WOT runs at least a few times a day. I've been down the 1320 at least 25 times, and she seems to be better by the day. Even the clutch is still holding 100% fine. I call that quality no matter what anyone says. I'm sure my motor will be the first to let go with the DDM kit, but I will have no blame for DDM at all. I probably would let them know, and then go on with my life.