Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Looks nice, but I can never get a consistent reading

I really wanted to like this thing, with its attractive design, easy-to-read numbers and sturdy construction. Unfortunately, even though I placed it on a flat, hard surface as instructed, I can never seem to get a consistent reading out of it. This morning I stepped on it twice in row and somehow "put on" a pound and a half in the course of 5 seconds. I don't know if I got a defective one or what, but this machine drives me crazy. I can't recommend it.