Mike B.
Yelp
I didn't go on the guided tours, though I did attend mass here and returned to snap some photos I had forgotten to take on that prior visit.
it was neat to attend mass in a church that has seen not only Habsburg royalty, but composers such as Haydn, Beethoven, Mozart, and Vivaldi.
in retrospect, I should have done the catacombs tour as well, though I missed seeing a sign for that; it sounds pretty interesting. duly noted for a return trip.
easy to get to - Stephansplatz is the big U-Bahn stop right here, but realistically you can pretty much walk anywhere in Vienna given enough time and HIGH ENERGY as I have.
overall, it was very well-maintained, and security is visible but not oppressive. however, I wish they would do a better job with the guys outside dressed as Mozart selling opera tickets - mostly because they like to crowd by the entrances/exits of the church. yo, I know you gotta hustle to make money, but maybe not try to cause a fire hazard?
there is a small shop which sells mostly religious and historical items (rosaries, Bibles, tour books, small statues). I felt that was appropriate - I hate seeing when churches or other historical locations are simply looking to make a quick Eurobuck with cheap trinkets.
if you want, you can pay to take an elevator to the top of one of the towers, though I didn't. the location, in the center of the city, didn't really appeal to me for photography. funny enough, a few days later in Budapest I did walk to the top of the similarly-named Saint Stephen's Basilica, which had better, more sweeping views - but that's a story for another day.