They have really good information on their site, it's worth looking at.
Anyway, I'm really happy with their sauna. I almost went with a local alternative, but it would have cost $9000 instead of $2500, I just couldn't justify that difference in cost and as it turns out, I made the right choice.
They are based out of Canada, but might ship to the states.
In any case, it was a great purchase and I'm very happy that I made it! For people who have trouble exercising, there is nothing better and it should be used everyday. I believe it has helped me quite a bit.