There was a thread in this section not that long ago where modellers discussed the pros and cons of this stuff. I tried to find the thread so I could post a link but the search feature is lacking. Anyway, some guys are finding it quite useful for some things. It seems popular for glueing windows as it allows you to clean up any mistakes before hitting it with the UV, or after the UV it can be removed from the glass with a finger nail.
I recently picked up the Bondic version. I haven't tried it yet but I think it will have some uses. Adhesion is limited as you have discovered. I am curious to try it for foil casting small badges and other body details.