Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Item did not work.

I don't know how this has 5 stars at all. When I got the package, I wish I knew it would not have AC power.When I placed my 1st item it would jump between .1 or .3 oz. It wasn't that bad. The next day I tried again, and it was off 2 to 3 oz. Then when nothing was on it, it would jump between -2 oz to 5 oz. Nothing was on it! I didn't have anything to calibrate it. Sent it back on 7/22/2010. I bought the Escali and it came today. Works perfectly so far. Get that instead.