I have a Smart Carry, which is great because I can wear it with shorts and a T-shirt, and it's very covert: and I thought it would work well when I get back to motorcyling. But I only use it with my Kahr CW9. I think that with a larger gun it would not work so well for me, because things can get pretty tight depending upon how I move around and how scrunched up I get.

I use a Comp-Tac MTAC (looks very similar to a Super Tuck) for my fullsize XD .45, and it works just fine -- although it took a lot of experimentation to find the best position, and I have to wear a cover garment.