i have a super tuck, and i have been wearing and training with it at the range. I like it alot. mine is the black leather version, as that is what they had at the gun store. it is super comfortable to wear all day long, even seated in a car on a long road trip i forget that it is there. one thing that makes it so comfortable is the fact that the backside is leather, and wide, so there is no "pressure" point on your hip, lower back etc. it distributes the weight and the holster over a wide area. very concealable as well, not only because it is a "tuckable" but even without tucking it, it is still great. and there isn't much more you could ask from an iwb holster. it is also very adjustable as far as depth in your pants, as well as cant.
i will warn you that there is not much "retention" when you put the gun in the holster, but when you are wearing the holster and the gun is cinched down under your pants and belt the retention is fine and plenty, and it gives you a smooth easy draw.
i wear mine on everything from a 1 1/2-1 3/4 belts, with no adjusting at all. i carry a sa xd service model, and i have nothing but great things to say about it. i will continue to train with it, and carry it, and i will let you all know if i cahnge my mind, but right now all is lloking good.