I've been and really enjoyed it. When you first put your feet in the tank it feels as though you're paddling in lemonade. Then you relax into it. Oddly, I found I couldn't watch them nibbling me, but was OK looking at other people's feet. My skin was nice and soft afterwards and I'm sure it would be good to keep it up and go regularly.
If you have a choice however, go to anywhere but Dr Fish as they are usually in really public shopping centres. We went to a small salon in a small town where they charged the same fee but offered a lovely quiet relaxed atmosphere. They had time to assist and make us feel special.