Instruct: Classify Amazon reviews into positive or negative sentiment
Query: mri cricket tennis balls

MRI cricket balls are nice and hard. They have excellent bounce and are great for nice pace bowling. There are issues:- the coating (the tennis finish) on them wears out really fast, and soon exposes a dark colored rubber interior (in abt 10 overs).- These balls crack if hit hard for a few times (a typical onslaught for 10 overs, say): this is almost impossible to happen with the conventional wilson tennis balls- they are wayyyy overpriced! I hope they reduce the price, this would be a great buy for about $10/six-pack.All in all, a nice product.