My first time playing at Insane was this past Saturday, and it was one of the best experiences I've had playing paintball. It was too cold to play outside, so everyone stayed inside and played on the indoor fields, which were awesome. The staff was always cleaning the fields when nobody was using them. There were still a few spots on the field that were slick, though, but there's not much you can do about that. The staff was also very professional and courteous. You fill your own N2 and can fill either 3000 or 4500 psi tanks. The field paint there was Draxxus Blaze, which shot well. They do have their own proshop onsite, which is very convenient, and they stock other brands of paint such as RPS.
I would say this place is a "paintball complex" not a "paintball field". With both indoor and outdoor fields, the pro shop onsite, and the friendly people there, this is probably the best place to play paintball in the Southeast.