Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't even last one summer.

This "cover" is nothing more than a cirle-shaped sheet of bubble wrap. It is easy to put on and take off and does raise the water temperature, but it fell apart before the end of the summer. The bubbles disintingrated leaving small round pieces of blue plastic throughout the pool. Now when I try to pick it up, my fingers poke right through what is left of the cover. I gave it two stars because it did what it was supposed to do in heating the water, but it failed miserably in durability.