Here's what I like:
I travel a lot. When I'm in town, I go, but don't like paying for gym memberships that I don't use for 2 weeks at a time. At PP, I buy a group of classes and get a great value.
The value is not just in $$, rather the entire experience. Easy, online scheduling. Very professional staff. A great workout (I prefer Spinning, but there are lots of options). Extremely clean and well kept up.
So far, in my book, this is a Win all the way around.