I was asked by Dr to monitor my pressure at home. This machine seems to do a good job, the numbers of most home machines I have been told are not always 100 percent accurate and there is a learning curve to using them. Look up the proper way to take your pressure, I found to get the best reading I had to also take it a couple times in a row and calculate using those numbers. I have found that the readings I am getting are pretty close to Dr's numbers.