Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works great but poorly built

Inexpensive, light weight and works really well. What more could you ask for.... After only 2 hours of use the handle part simply fell apart. The plastic casing started to literally go to pieces. Maybe an occasional defective one that got thru inspection. Exchanged this one for a new one. Same story. I think the vibration is too much for the casing.