Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Spool design is blatantly flawed. :-(

The twine for this unit is flimsily wrapped around the inner spool. What this means is that while in use, the twine either spits out way too much at a time (wrapping it around the base, requiring down time to fix), spitting out none at all (resulting in a dramatic 1-inch cutting path), or sucking the twine back into the spool. Very poor design. Twenty minutes of weed eating cost me an hour. Forget the ease of lightweight battery power...this one is inherently flawed. :-(