I have used Thunderwear to conceal the following on a repeated basis:
Colt Series 70 Lightweight Commander,
Glock Models 19, 23, and 30,
Beretta Model 92S,
Colt Series 70 Government Model,
S & W Model 60 2-inch revolver
It is my favored "office carry" method when I am likely to be dealing with customers and do not wish to flash the piece. It is slow to get into action, especially if you have a paunch. And it does occassionally need to be shifted before you take a seat.