Have used the MP and the Mr G thin head gaskets for years. Never a problem. Properly lube the bolts and torque in 3 step sequence. Also make sure the decks are clean and not warped, but that holds true for any gasket really.
have used numerous sets of the thin mp or mr g head gasket...as said...clean both surfaces....and torque head bolts in 3 steps...with the proper lube on thread.