We got one for the Kel-tec P3AT, and last time I wore it I had an issue with the magazine well poking out. Granted, I'd just had a baby, and it probably wasn't intended for a nursing bra, but I had problems getting it to conceal. It wasn't too uncomfortable, actually, aside from the sticking out part.
Seems like a good idea in theory, just might need a bit more tweaking.
I'm planning to work on some outfits and holster reviews for women sometime this week, because I've heard so many guys say their women don't carry, generally because of wardrobe issues. I want to share how I manage this. It won't be anything stupendous, but maybe it will help convince some ladies out there that they can carry without buying a whole new closet.
It'd be great if you girls want to chime on how how you carry, what holsters you use and what you wear.