There is no way that it's $15 for 300 sq ft. that's way too cheap

I've read that peel n seel is pretty thin which means more layers. You may say who cares I'm saving money. Let me tell you you'll be crying the blues when you are in the middle of the install. It's not a hard process but it takes time and patience. Also I've read that it's not that sticky and won't really hold anymore than two vertical layers.