Yep, seems to fail on 90% of the machines for some reason..
As soon as I "approved" it for release to the endusers, after succesful tryout on my testmachines, it seems to fail once the "real" users try to obtain them.
I am offering the installation in the Application Catalog, and not doing a "classic" deployment as the guide describes..
So after all this, i tried to to the /A instead, which gives me the *.msi, which in most cases makes everything easier and more failsafe, but like I said: It doesn't seem to deploy the msi silently.