Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: More than adequate motor, best for shorter people.

As everyone else says, goes through string fast, but much better than bumping or manual string advancing. I'm going to try re-spooling myself. I was going to buy extra spools, but changed my mind after it went through the first spool in about only 1 hour of use. Did not give it 5 stars due to few factors: 1) Not for tall people unless you like to hunch over. Just right for my kids to use, but I am 5'8" and have to hunch a little even with the longest setting. 2) Bottom motor design makes the trimmer head heavier, which makes you have to push down on the back handle all the time, while holding the complete weight of the trimmer with the middle handle. I rigged a shoulder strap to the middle handle, which improved the handling and weight distribution 100%!Black & Decker take note: Make the unit longer and include a $2 shoulder strap!!!