I had the same great service with them and just install the PinPAC 7 Roto-MAC CG3 on my MB SE.
Works great! Quickly learned to only give the external volume knob 1 click at a time.
Maybe took me 15 min to do the whole thing.
I really like how it come with the external sub hook up.
It's about double the price of the ones for stern spike 2 bit I think worth it.