Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Omron HEM-780 Automatic Blood Pressure Monitor with ComFit Cuff

This monitor failed to give accurate readings for me and for my wife. Both of us have moderately high blood pressure of long standing. I bought this monitor (to replace one that had been broken) to keep track at home. The HEM-780 reported that both of us had low blood pressures! I brought it to our doctor's office for comparison, and it was way off...about 40 mm Hg high on systolics for my wife, and 30 mm Hg high for me. Had no trouble with the simpler Omron I had before.