I have the Innocase Surface II on my Fascinate as well....ordered it as soon as I saw it was available online. My feelings are pretty much the same as the OP's. Great look and feel, but the buttons aren't the easiest to use and the phone is a little loose in the case. It isn't extremely loose, but you can tell if you shake the phone. It may be due to the 2-piece design but I don't know.
The deal-breaker for me is the button accessibility. I'm currently waiting for an RMA number to send this back and I'm going to try the Active X as soon as it becomes available.