Instruct: Classify a given review as either positive or negative.
Query: Black & Decker ST7700 13 inch 4.4 amp

I say what the hell is this... so frustrating the string will not advance and when it does it's so thin it justbreaks off. I had rather get on my knees with the kitchen scissors to edge my yard and get this frustrated with this product... Black & Decker, you don't test these products??????