Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for occasional use. Serious design flaw.

While the Greenlee GT-11 works reasonably well it breaks easily if dropped. The on/off switch breaks and the product is useless. I carry a tester at all times in my shirt pocket and sooner or later it will take a fall. After buying two of these at Home Depot I finally made to a supply house and bought the much superior Fluke product. More resistant to breakage and sweat.