Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not reccomended

Great price and thought it would work based on some of the more positive reviews. But...either this unit is low powered or the flys in my part of the country need 220 volts to kill them. (I live in northern calif.) I have shocked flys with the accompanying sparks and smoke only to have them power up and lift off out of the unit and fly away. One benefit not listed on the packaging is its abilty to bring happiness. My wife has had no lack of humor laughing as she watches me chase, shock and then rechase and shock the same flys who defy death. Oh well, from a physical fitness aerobic standpoint this unit cant be beat. And rather than invest in costly pulse monitoring equipment using this unit puts you on the move making every attempted kill event an experience just shy of your target heart rate.