endless pool? (color, black, brand, better)

[sushi66]

Anyone have one or used one much?

[K'ledgeBldr]

I guess you're referring to the pools that have the current you swim against.(?)
I haven't, but if you're looking for info on them-contact local swim clubs. Some of them use them for training purposes. You may also have a chance with some physical therapists.

[NYLIER]

You can check out websites like poolspaforum.com, epinions.com or pissedconsumer.com. You can get advice from people that have bought the endless pool or maybe know of a better brand to purchase. I was thinking about purchasing one but they are very expensive.