I really like Cauterets. We've been on three separate occasions and skied two days of a week mixed with Luz-Ardiden, Bareges/La Mongie and Piau Engaly. What I particularly like about Cauterets (apart from the great snow) is that the bowl offers loads of in-bounds off-piste options without ever getting that far away from everyone. You can jump off the top ridge in many different places and choose lots of different routes down before joining marked runs. I think it's a great place to get into relatively safe off-piste skiing and learning how to set off into steeps.