Thoughts on Sephora Full Makeover?

Going to my boyfriend’s military ball (not until spring time, just thinking ahead) and wondering if anyone had opinions/thoughts on going to Sephora for one of their full custom makeovers? Last year I went to a salon and spent $150 not including a tip just for getting my makeup done. And between getting a dress and my hair done, it will be expensive. I know I have to make an appointment, and that if cost $50 or you have to buy $50 worth of product to get the makeover (or something like that) but $50 is better than close to $200! I’m just scared of not liking my makeup the day of the ball and then being screwed lol..thank you!!