Hi there, used the dive case for the first time for a kitesurf, no issues with the gasket dry as a bone inside after several heavy water impacts though obviously no great depth.
Case comes with desiccant inserts which I didn't bother with today and fogging wasn't an issue.
As for the rest of the case be warned it is MASSIVE I used it on the wrist mount today and the size/weight increase over the 'naked' virb is quite considerable.
Also my biggest gripe is that you can't access any of the buttons on the right side of the camera- no stills or changing settings once in the case!!
Hopefully the +ANT remote will be released soon but that's not got to help for proper underwater use cases!