Ok so I have had some experience with both the hand airbrush tanning and the mystic tanning.
First, I would not recommend the mystic before any special occasion. Andy and I both went before we went to Cabo last December and it totally flaked and faded out in a not so cute way. I was super blotchy and peeling between my boobs and my real tan from the sunshine wasn't showing as well. We both said there is no way we would do that again before our wedding or before a vacation
I also got hand airbrushed spray tanned before the BD pic shoot in September. I actually had to stand in a little paper covered room booty a$$ naked and have some gal spray me. Despite the really awkward encounter...the color turned out really good and saved my a$$ literally from looking scary. However...that night of the spray tan you can't shower and it was by far the most uncomfortable feeling...super sticky, you look like you are a completely different race, and it smells sick. I couldn't wait to shower the next morning, then it looked fine. I did feel a bit orange, and with my blonde hair I felt like a wannabe barbie which is not the look I'm ever going for!
Basically, I don't use tanning booths and wouldn't get either method of spray tanning done again. It just does not fade well....you will peel and look scaly....not cute. I use the jergins natural glow or the Dove one is good too. That would be my advice...stick to the color nature intended for ya!