For what it's worth, I bought some of their Instant Spray Wax off a recommendation from a friend and wasn't very impressed with it. Did not last long at all, a few days tops. My bottle doesn't say Top Shelf on it so maybe they improved the formula.
I've used the original one in the past.Can't comment on durability,but it does leave a very bright synthetic looking finish,which I did not care for.May be useful during lovebug season for front end surfaces since it contains flouropolymers,to possibly aid release.
This product is sold on qvc. I called the owner direct to see if he would wholesale it to me and he was cockey and errogant so I stick with optimum, which is awesome