Float tank anyone?, Has anyone tried this method of relaxing Options

I was wondering if anyone had been in a float tank, apparently it is another way to mindfulness, only it is done with sensory deprivation instead.

The person goes into a tank of water which has Epsom salts in it and they float, there is a choice of floating in the dark or leaving the lights on inside the tank.

This is said to stop overactivity on one side of the brain and balance both sides out allowing deep relaxation and the ability to reach parts of the brain that allow for creativity, imagination, self-visualisation and problem solving.

(IMG:style_emoticons/default/sleeping_.gif)

Actually, my father and I plan on building one such tank in our allocated "meditation room" (The joys of building a custom home--aside from paying for it until you're dead (IMG:style_emoticons/default/13.gif))

The only damage I've heard of done from sensory deprevation comes from being driven insane--since one has no concept of physical orientation any longer.
Kind of like how locking a person in a lighted room, with no clocks or windows to base relative time off. Allegedly, they go nuts.
I forget the name of the study done on this--back when ethics in human expermentation was less than strict.