There is a detailed real use review at
http://mobile.slashdot.org/article.p.../03/13/0250226.
Regardless of where one falls on the snapped versus zipped issue, it is clear that the CPF is a thoughtfully designed case.
BTW, I've never found that the scanning process was so difficult or time consuming so that the added complexity and weight were worth it.
Oh, one last thing, there is a design from Aerovation that does away with both and claims to be fast and effortless.