I bought this blood pressure monitor for my husband who has high blood pressure. Unfortunately we found out that the cuff wasn't big enough for his arm. The doctor said that if the cuff doesn't fit right, then you don't get an accurate reading. This monitor is for arms 9 to 17 inches in circumference. We didn't know when we bought it that the cuff size was that important.
I have used the monitor myself and found it to be accurate. It is very simple to use. It not only gives you the blood pressure reading, but also your pulse reading. It also has a memory of the date and latest readings that I had. There is an error indicator and a low battery indicator. There is also an AC adapter, so you don't have to use batteries. It all comes in a nice storage case.