Purchased this to keep a check on my blood pressure at home as I had had a scare when my blood pressure shot up and I ended up in hospital. I read the reviews and found that this make is very similar to those used in GP surgeries. I didn't need anything too complicated and this machine is really easy to use and gives all the information I require. I have used a number of wrist blood pressure monitors over many years with variable results But on renewing I went for the full upper arm monitor this time. Yes it is a bit more expensive and a little more fiddly to fit, but the results are more reliable and consistent. Highly recommend this monitor.