I have been using SD tanks for years. There is a spa about 30 miles from my house where I go, every other weekend, and float for 2 hours at a clip. For those expecting miracles or hallucinations upon your first or early experiences, it doesn't really work like that. Also, shorter duration sessions tend to be less enjoyable, and for me, it isn't really until hour 2 that get where I want to go. And, it took me several months to really start enjoying it in ways other than simply relaxation. Don't give up, though...if you stick with it, you may find that floating has the potential to really change you, and sometimes when I am done with a session, and go have lunch, drive home, etc., I feel like I've slept/rested for a full night. And it's effects can last for more than a day, I've found. One of these days I've going to go in after taking a psychedelic, but I've avoided it because of how structured the experience is, and how many people you must encounter before, during and after, as well as the long ride home.