Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great product. I now own 2, after a couple of years of having the first.

Some other reviews say that it weighs too much and hurts their eyes. I get severe migranes about once a month and I heat this up in the microwave for about 45 seconds. The difference is that I put it on my forehead. Please, keep in mind, this is not going to COMPLETELY ease your migrane. This is to help. On an onset of a migrane, I take some prescribed medicine and use this product. It really helps alot.Cons: It does get pretty dirty.