Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap, but adequate for light use

I'm using the hot knife attachment to cut 1/2" thick foam rubber mats. The blade cuts cleanly and smoothly after it reaches temperature. However, it cools quickly in the foam and there's always the fear that the thin metal will break.The bigger problem is how the blade attaches to the handle. The blade screw is inserted through a bushing and screws into the handle. It's tough to tighten and regularly works loose. The last time I tightened it the screw broke off down in the handle.I'll order another one simply because it's cheap and pretty much exactly what I need for my one-shot project, but I'm disappointed at the overall poor quality. Do not by this if you have heavy duty work or need something that will last a long time.