Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a great gnat trap

My dog & I were both being attacked by fleas. It wasn't a bad infestation, judging by the fact that I only saw a couple, but it was very annoying. Both of us were very itchy.I bought 2 of these traps; put one in the bedroom and one in the living room. Left them on 24 hrs a day for a week. They caught about 30 gnats and 1 flea.I wanted to believe that maybe there just weren't any fleas, but my dog was obviously being bitten and was non-stop itching. So, I finally broke down and used frontline (I hate to use pesticides on her) and the problem was solved.Even with my bedroom door shut all day, with just the trap inside it still only caught 1 flea. Not really worth the $20.