I received a SuperTuck as a gift. It was my first IWB and my pants were already snug, so it was no-go until I lost 10 lbs. Now I can enjoy it as comfortable all-day holster for an M&Pc. The standard M&P will also fit the holster, but the longer barrel digs into my hip. Also, the metal belt clips have sharp edges that scratched up my belt.
Using this, or any other, IWB holster for full concealment with a tucked-in shirt tail is a hassle, so I always have a jacket or loose shirt. That said, this experience with an IWB causes me to favor OWB holsters. As stated in a post above, holster preferences are highly personal and individual, so YMMV.
FWIW, I was oblivious to the religious aspect of the CrossBreed. Perhaps they need to be more overt.