I have the SP101 in .357 with a 2.25 bbl. It is a little heavy when compared to the Airweight S&W's but it shoots a lot easier. I can fire full house 125 grains and it doesnt kick any more than my full size Kframe.
I work in an office in a city, and I cannot wear a holster that is visable when I wear khakis and a polo, so I carry it in a pocket holster.
I used to only carry a stainless PPK in a pocket holster, but now I think I am carring the SP101 more. The PPK is flatter and a bit smaller. The SP101 hits a lot harder.
I like the 3" bbl model, and I bet its even easier to shoot, but this is a carry gun, so the shorter barrel makes more sense.
I have a lot of holsters, and I carry a lot of different guns, but unless I am going to wear a jacket, I find the pocket holster the most effective way to carry.
Massad Ayoob had a great article on a 24/7 carry gun in Backwoods Home, and he liked the 2" SP101 the best. You should try to get a back copy of it.
http://www.backwoodshome.com/index.html