Instruct: Classify Amazon reviews into positive or negative sentiment
Query: band poor prototype design

The velcro band doesn't work if you alone are planning to tighten it to take your pressure. First the design doesn't work prototypically. It is a hard formed half band with a huge velcro strap and there is no way to tighten it to get the automatic meter to go beyond 148 starting out.If my pressure is over that amount I would never know. Sorry that I didn't know I need someone to make it tight on my arm everytime to get an accurate reading. All I get are really low readings. I have tried to lean against the wall to secure it tighter but it doesn't really work either. Buy the one with the metal loop you can tighten.Omron HEM-780 Automatic Blood Pressure Monitor with ComFit Cuff