After having tried BG, vanDoren and Dave Guardala mpc patches, which got me from 5 minutes to 1 hour, biting the mpc itself, these Silverstein patches are awesome. Playing tenor sax already for a week using one, this is still without any significant deformation to the surface. Hip hip hurray.
The price is triple the normal ones, but these will last multiple times of 3.... so in the end I am winning not only financially but also make me a happy non-frustrated player, that counts for 5... !!