I always carry my HK Compact USP.45 with extra mags every time I can. Sometimes the clothes I wear prevent me from carrying this setup due to size. So I bought a S&W .357 Hammerless Air-Lite as a back-up when carrying the .45 or in case I can not carry the .45. The gun is awesome to carry, you almost forget it is there. Let me tell you though, if you are plannign on getting one of these and the sale guy tells you "It hurts", he is not kidding. I put 10 rounds through it and my hand hurt for the rest of the day. The lack of weight puts all the recoil right into the web of you hand. It will not be a range gun but I can promise that is a 24/7 gun. 2 thumbs up.
Will try to update with pics later.