Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Poor design

I would not recommend this product it is build very poorly. First time i used it for it was cool and worked but it got so hot and there is no heat shield to protect the tank it i think it put a hole in the tank or something because it leaks every time now!! Very poor design. However the company Musicians Friend refunded my money so kudos to them for being a cool company. Unfortunately I do not recommend this product.