Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing

I purchased this product as a gift for my sister and never actually used this product. She made multiple attempts over the course of several weeks, including two phone calls to customer service, to try to calibrate it correctly. It was quite high-tech, but did not provide accurate step counts any better than one obtained with a fast food happy meal. She was not successful and reluctantly returned it.