I'd say, must try before you die. I liked it at the time. Did it completely silently and blacked out (lid closed). However, I had fucked up hips for two days after. I think i must have tensed up without knowing it. I'm sure it's gets better during the second float but I don't know that I'd ever be interested in the second float. I did it to force myself to meditate. There must be better ways.