Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very useful gadget

The Norprp cast iron panini press is a very good and useful gadget. I had really gotten tired of using a filled-up tea kettle as the top weight on my grilled cheese sandwiches. The press has just the right amount of weight, covers a wide area on my 11-inch calphalon grill pan, and is easy to clean (just a quick wipe-and-dry). The reason I gave it four instead of five stars is that the ridges on the underside are pretty useless. You can't really heat this thing up enough on the gas burner to use it to simultaneously grill the top-side of your sandwich as the product lit promises. It never gets hot enough and loses heat as soon as it comes off the flame. So for me it's just a fancy weight -- but that's what I bought it for.