Well I've found this product to be ok considering the excellent price. It is however not the easiest of things to fit hence only 4 star's. You will need to clean your sill THOUROUGHLY before fitting using White spirit or similar and I recomend using a Hairdryer to warm sill first and then to warm strip once fitted, this will aid adhesion. It's very sticky stuff and gets air bubbles in very easily. If your after something for a "show" type car then this may not be for you, for just protecting your average car though I found it great other than awkward fitting. As already said the stuff does "shrink" a little which leaves the sticky tape showing a little which is why a say it's really just protection for the average car at a cheap price, if you want something "classier" then you will have to pay a lot more money for a different type of product.