STP Son of a Gun Protectant

Anyone ever use this stuff? Is it any good--plusses or minuses?

I had a free sample of that stuff, that i used once. I wasnt all that impressed with it, No matter what i'm sure someone on e the board has an objection to using it and has the ultimate answer to what protectant will not harm anything at any time and should be used regaurdless of price. I think the STP protectant worked about as good as armmor all.