I have stonguard. I recommend the following prior to installing it
1. Do a thorough detail to remove all the swirls etc, in the finish first. Otherwise they show throgh and there's nothing that can be done about it.
2. After installation tape off the edges before using polish. Otherwise the edge catches the wax and it is hard to get it off.
3. Dont put on the door guards, they are the worst at this (refer to #2)
Also make sure a real pro puts it on, it's tricky.
My impressions of the product are good. It certainly helps alot. I also have the headlight and fog light guards too. All have protected my baby's fine exterior. I would definetly recommend this product.
Good luck!
As to price try this email
wlshores@aol.com