I took the LSAT here in June 2016 and have zero complaints.

The proctors were very professional. An assistant dean was the main proctor, and had two recent graduates assist with passing out exams and observing for cheating. Things happened on time. They were forgiving of little irregularities, like the girl who accidentally tore her answer sheet, and the guy who walked in seconds before they started reading instructions. All proctors were very friendly and helpful, and this is about as far away from a horror story as you can imagine.

Facilities were clean and adequate, with easy restroom access. Desks were long tables with spaces between each person, and there was plenty of room to spread out. Chairs were comfortable, even for somebody who is finnicky about those sorts of things like me. The classroom had a clock available and easily viewable (but definitely bring your own watch if you have one). The room was a little chilly, comparable to a cold movie theater, so people who get cold will want a light sweater. The temperature wasn't ridiculous.

They did not provide snacks and drinks like a previous poster indicated. The one complaint I have is that they wouldn't let any snacks at all in a non-transparent container. I had one of those squeeze pouches of applesauce, and they wouldn't let me bring it in. People were required to remove labels from water bottles. It seemed ridiculous, but I'm not sure if this is a quirk of the testing center or an LSAC thing (a previous administration at a different location didn't seem to be so strict, but my memory might be faded).

They did invite all interested parties to ask questions about Arizona Summit, but I didn't feel like it was pushy. The school hosted an after party at a popular nearby bar/bowling rink, which was free to all test takers. I didn't attend, but it was a nice gesture.

I scored well enough on this test administration that I don't have to retake, but if I did, I would absolutely do it at Arizona Summit. It was way better than ASU where I had taken the LSAT previously. If anybody reading this is wondering, this is by far the best place to take the test. I would even go so far as to suggest changing your testing location if you can.