The mystic tan is great (yet a little pricey)...
you stand in the booth on a metal plate... you are given a very low charge so that you are one charge, the mist is the opposite... this is why it is so even.
When you get out... you towel off (if you don't, it will streak).
I loved it! But at $30 a pop here in VA... I only do it occasionally and fill in with my Coppertone Ultimate Summer lotion.

I don't tan (naturally) at all... so "fake" tans are my only option.