I had mine done quite a few years ago, a birthday present from both daughters as it’s quite expensive. Sorry I can’t remember where it was except it was in London ( we all live in the SE)
I found out my colours for clothes and makeup. I realised I’d always wore the right shades of lipstick ( no pinks, just corals and reds)
I am a warm Autumn, look on a colour wheel to understand . I wear corals, golds, green, turquoise, red , cream and navy rather than white and black, which I always realised I looked dreadful in .
I get much more compliments on what I wear since I had it done, it was very enjoyable I recommend it.