I've got a UCH for a S&W model 60. Great in vertical mode, I find that the holster can tuck under the edge of the waistband, making for a near impossible draw when set to FBI cant. This may however be due to useing a standard dress belt rather than a gun belt.
Conceals under a Hanes t shirt and a pair of jeans. one thing to keep in mind is that an undergarment will improve comfort, especially in hot weather, as Kydex and human skin are not the greatest match.
Radgast