I bought a Paragon stencil set from them and the stencil for the front of the cabinet was about 20 percent smaller than it should have been. I sent them measurements and although the second replacement they sent me was usable--I still had to trim and fudge it a bit.
I purchased a Space Invaders stencil set but checked them BEFORE I sanded and took the paint off the cabinets. Surprisingly the stencils were pretty good seeing that the cabinet artwork on SI is much more complicated than Paragon. They still required a little massaging to get them right though.
My main complaint is that there are no registration marks on the stencils. According to the directions, you are supposed to use the cabinet as a guide. I don't know about anyone else but my stencil sizes varied a bit, which made cabinet alignment difficult if not impossible. When I restored my Defender vid, I used Gamestencils and those stencils were much easier to use because they had registration marks which allowed you to properly align each stencil. They also give some nice step-by-step instructions on their site.
As far as the adhesive goes, I waited a week between each stencil spray just to be sure so there was no lifting in the paint.
In all, the cabinets look better than they did before but I'm starting to think twice about re-painting.