I took it last January in SD, the one on Shoreham Place. They won't let you bring anything into the actual test center, I was sick and I couldn't bring in tissue or a beanie with me, but they had tissue right outside the door at the moderator's desk. They have lockers for you to put your stuff into. The moderators were really cool, didn't have any problems with staff. The orange earcups SUCKED! and you can't bring your own earplugs, even if it's still in the package. They don't sit snug around the ears, so sound just leaks in, and they're not comfortable and become more of a distraction.
I was lucky in that I was the very first person to begin my test in my testing room, which meant I had quite a bit of complete silence as I eased into the the physical science section. That also meant that I was doing verbal while it was relatively quiet. Others were complaining that b/c they got a later start, they were doing their verbal section as others were on their writing section, so all they heard was people clacking away typing up their essays and they couldn't concentrate on reading a passage on some random artists' life and death; that must've sucked. So noise could be a problem.
Chairs, desks, computer screens were all fine, no problems. Temperature and environment were fine, never bothered me. Other than the earplug/noise issue, it wasn't too bad. I've definitely heard much worse.