Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sounds great until you get one

So I received this today in the mail and it was in perfect condition. I had read some reviews about them arriving cracked/damaged. After about 9 hours of use in the 90 degree heat of my leopard gecko's tank I heard a crack and the upper half of the cave (not the lower half that takes all the heat from the UTH) split in half. I'll be getting my money back.