Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money

I ordered this HRM about three weeks ago and have been very disappointed with the performance. The signal from the monitor to the watch has been inconsistent at best. About half of the time, I can't get the watch to detect the band, despite using water, etc. Additionally, I've seen technical difficulties on numerous occasions already (obviously not reading correctly). The HRM also grossly overestimates the number of calories burned (one of the main reasons I even bought an HRM). Save your money and put it towards a higher quality product.