Although you have to pass through a large hangar to get to the FBO, the prices are great and the staff makes you fee like you are not at a large international hub. If you fly into SAT I cannot see any reason to use one of the other large FBO's
Flew in to Skyplace at KSAT from north Texas on 29 Feb 2015. It was my first trip into KSAT. It was easy off to the Skyplace ramp from rwy 12L. Line guys & office personnel were great. Lots of "heavy metal" parked on the ramp and in the hanger. I was treated as first class in my C-172. I topped off with about 15 gal. of 100LL. Had the use of the crew van for about 3 hours. I called while in town to see if I needed to return it and was told okay to keep for now. Fuel was a little higher than other FBOs but it was easy-off to the ramp and to departure. It was all worth it to avoid the taxi hot-spots and ramp congestion on the south side of the airport.
Purchased fuel after maintenance at Textron, the service was prompt and the price was very good. Although it did not affect this flight the office was only accessable by passing through the hangar which might be a little awkward with passengers