Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Eureka EUK71AV Handheld Vacuum

I am a professional purchaser for a nationally recognized R & D institution.I reaserched hand held vacuums utilizing exactly the same methods I employ on thousands of work related products.I specifically looked for a light weight,powerful,quiet,multi functionalhand vacuum. I previously utilized a Dust Devil unit that weighed considerabley more,constantly screeched until you were deaf, and couldn't do the verticle portion of stairs.The Eureaka EUK71A alleviated all those problems.The only side effect was when I vacuumed some carpeted stairs and discovered to my chagrin, how much dirt and debris that was really hidden in the carpet.Except for the unknown longevity of the internal filter, I give it a big thumbs up.