SA3135 is to new to know its long term reliability... whether it lasts 1 year or 5 years eventually it will need replacement parts... and where ya gonna get em? its already been determined gen hands dont fit, gen balance wheel dont fit, gen stem doesnt fit. a long term reliable bet would have my money on an ETA or Sellita movement (NIB $125). being able to use a gen datewheel, dial with out clipping it, and a true 1:1 case is attractive option, but long term it could be a nightmare and a waste of money, especially if they are planning on improving and releasing a new version of this movement dropping all support most likely for the current 3135. you know how the game goes, things change every 6- 8 months