My husband is a quad and we have used the pool chair at BLT. It is plastic with a net like seat. He transferred from his chair into the pool chair and then the pool chair can roll right into the pool (at BLT anyway). BLT has a zero entry pool, which means it's like the beach and it gradually gets deeper until you're all the way in. A lifeguard at BLT said that all of the deluxe resorts are zero entry, which makes it easy for getting in and out. My hubby transferred out of the pool chair into the pool and was able to float around with his life vest on. You can also just sit on the bottom of the pool in the shallow area. Getting out was easy, just roll the chair in deep enough so that he could transfer on and I pushed him out. There were not foot rests, so he had to hold his feet up himself, but it made life super easy for us!
Hope that helps!