Pros: lots of un-groomed terrain
Cons: Cascade concrete
Crystal is a large area that is mostly un-groomed, deep, (usually heavy) powder. It has several bowls of lift-accessible, avalanche controlled terrain. This is a real playground for advanced skiers. There are plenty of runs for beginners and intermediates, but you need to be able to ski steep slopes with deep, heavy snow to be able to really appreciate this place.
There is a great run for true beginners that has its own, dedicated chair lift, which is nice for the little ones. However, the rest of the greens are a big step up.
Another key point, people here are nice. Please, if you are not nice, there are lots of other ski areas where you will have a great time.