Instruct: Classify Amazon reviews into positive or negative sentiment
Query: omron hem-780n3

3/2009 i received this highly rated auto blood pressure machine. i work at a hosp, for 24yrs on nursing staff. I start by knowing my baseline pressure (manual) done by my RN friends and my doc. I workout and in good health! this machine was 10 to 15 over Dia and 7 to 10 over sys.I called Omron to get a verbal(blaming) walk through on what I did wrong and them resetting the machine. SAME problems. I was told to call the seller or send back but I had to pay for s/h. I was so disappointed by Omron. However i was Very pleased with the Seller ZENCORP007 for refunding my money and allowing me to pleasure to throw this poorly made item in the TRASH!! i have a old sunbeam auto bp machine cost me $30.00 4yrs ago will stay with the cheap machines work better.....Omron are morons.