I have the Omron HEM-780 unit for 1 1/2 years now and I find it to be inaccurate at times. The device has other problems with it like not giving me a reading at all, it just cuts out. This cut out problem has happened over 100 times. It inflates the cuff to a certain point, but then cuts off completely. I then have to remove the cuff and put it back on and redo the reading again.I personally do not care about the other features if it can not do the primary job and I find myself constantly using my backup manual cuff and stethoscope.