I used to have a G36 and I was very impressed with its accuracy and ease of carry, the dimensions of the G30S are very similar so I'd say it's a solid choice. I used to carry Speer Gold Dot +P 200 grain JHP
I thought it was called S because it had a slimmer back strap to trigger profile? Its what kept me away from it.Great choice, I have a friend dying for one...but not willing to pay the $900+ to get one in MA.
The 30S has the slim 36 slide and double stack mag. From looking briefly it seems its unique in terms of holster fit, meaning for a decent holster you'd have to order one specifically made for the 30S. Massad Ayoob has a good review here: http://dailycaller.com/2013/06/21/massad-ayoob-the-new-glock-30s-in-45acp/
"The 30S being new, there was no dedicated leather for it at the time of this writing. I didn't have Glock 36 holsters on hand, but would be surprised if the wider frame of the 30 didn't cause a fit problem. Since the "footprint" of the 30S is similar to that of the popular Glock 19/23/32 series, I tried the 30S in some of those.The results were mixed. It fit, well, "OK" in an inside the waistband Ted Blocker scabbard made for standard-frame Glocks. It was very snug in Glock's own low-priced plastic Sport/Combat holster for the 9mm- and .40-size pistols, more so than I was comfortable with. I found myself just carrying it in dedicated Glock 30 holsters by Galco and Ted Blocker. It worked fine from them, and carried comfortably. But, then, I'm used to carrying a Glock 30."
I think this is a combination of several factors, one of the primary being that 9mm is traditionally much cheaper than .45. Several classes I've taken the students had to supply the instructor with demonstration ammo, and usually they'll use 9mm to spare students too much expense. Also, it is the most popular cartridge with the civilian shooting market. The low recoil in 9mm also makes it an easy platform for demonstration, especially if you're constantly teaching.Ironically, almost all of the high speed operators on the training circuit are moving to 9mm.
Flavors of month constantly changing.