Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Omron Heart Rate Monitor

I just turned 65 and my Doctor advised me to start exercising. During my exam, he used a heart rate monitor that used a strap around my chest and a wrist-watch like monitor that showed my pulse. He advised me to use one while exercising to keep my heart rate within my safe range.All the stores in the Phoenix area were charging $100 or more. I saw the Omron HR-100C on Amazon for around $33. I have now been using it for over a month and it works just as well as ones costing much more. It also has a regular watch function, the ability to sound an alarm when your pulse is lower and/or higher than you want and a stop-watch/timer function. I have recommended this product to many of my senior friends. I've even used it while swimming with excellent results.Omron HR-100C Heart Rate Monitor