I got the airbrush tanning to my face and neck for my best friend's wedding. The things I did as Best man, lol! (That's ok though, because I made him have his eyebrows waxed). Actually, his parents did to, as did most of the wedding party. It was his dad's idea, because he was in a theater production of King Lear several weeks earlier and had it done for that.
It goes on quickly and easily and looks good when first done. There is a degree of "bleed out" the first day/night. Then it starts to turn slightly orange. Or, in the case of my friend's mom-really, really orange! She had a reaction to it and had too much of a glow in all the wedding photos. Not sure I'd want to risk that on my vacation!
Honestly, I can't see myself ever getting the airbrushing done again, and I'm pretty pale myself.