Love this product, in my opinion it's a must have for winter car prep. Stops the door seals sticking/freezing and ripping off when the doors freeze in winter. My wife's X5 is particularly prone to this freezing door seals for some reason.
Cost: 5/5 stars this is under $10
Ease to use: 5/5 stars built in applicator works great
Scent: 5/5 smells great not like a chemical