Let's just say, even for a newbie who didn't know anything, I knew enough to know that they weren't doing some things right.
Our ref ditched us after one or two games - he must have figured we weren't worth his time or something, because when we went back to the staging area, he was just standing there having a chat with his buddies.
I went through at least 4 12 oz (or close to that size) co2 tanks, and each time I would get about half a hopper of shots before it went empty (the characteristic farting noise). The paint cost an arm and a leg, but at least it SEEMED fresh.
The rental markers were in decent condition from what I could see. The person working in the shop at the time seemed to be servicing every marker that came back in to him.
No running water at this field, but that's with most outdoor fields out there. So I can't complain about this.
Overall, I think that this field will serve those with experience in paintball and have their own equipment better than first timers and renters.