I used to have them a lot and just make sure after you don't scrub your skin for the first couple of days just lather it and moisturise morning and night this will keep the tan looking fresh and new. You could top it up with holiday skin to keep it nice.
Your skin will only go as brown as it wants your won't look over done but be aware it will fade a little as soon as you shower as they use a target colour which sits on the top of your skin.
I am doing my own with St Tropez Mousse starting tonight and i'll just keep topping up. I have two events this week so need my tan a bit earlier.
One more thing- don't ever use hair removal cream on your fake tan - it will strip your colour completely!!!
Hope you are having fun with your sprays xxx