I can't comment on the M3050, but I recently had a set of CM3050s (45, 60, 80, 105) put on one of my basses and I like them a lot. They're not as stiff and unyielding as, say, the 45-105 SIT PowerFlats I used years ago (which were a traditional 45, 65, 85, 105 like the M3050s), yet are still stiff enough that the action on the bass could be set pretty low. I'm normally not a flats player, but I like these Precision Flats.
What I like about the CM3050 gauge is that the tension is pretty even between the strings (the tension numbers on GHS' chart corroborate that) and my fingers feel that "balanced tension" difference.
GHS Precision Flats are definitely not a bright flat, they're more thumpy, but man do they thump.
So, yeah, GHS Precision Flats CM3050 are changing my mind about flats.