I am a huge fan of of the SP101. I carry a glock on my hip all the time, but I usually take the SP101 with me in the truck for easy access while all buckled in. I'm not sure how much performance you really gain from the .357 out of such a short barrel, but it doesn't cost any more money, weight, or size so why not? I will say one thing... I do NOT want to have to touch off a .357 from it without ear protection. you've probably seen somebody at the range or something shooting a snub-nose .357 at some point. It gets attention. I would say there is a REALLY good chance of suffering some hearing loss, especially if you had to fire it from a tight space like from your vehicle. Maybe i'll get flamed for this, but it is for that exact reason that I keep .38 specials in the first 2 chambers in my SP101. The next 3 are magnums, but I hope I wouldn't have to take it that far.