No BP monitor is going to be totally accurate all the time, even the upper arm cuff ones. BP can change slightly even while it is being measured. I wanted the MOST accurate wrist BP monitor available and did considerable research before selecting the Mark of Fitness WS-828, even if the name struck me as a bit odd.

Research indicated that the Mark of Fitness WS-820 is not only clincally proven accurate and top-rated in tests by the German Hypertension League, but it is one of only 13 percent tested by the League to merit It's stamp of approval. This is a big deal if you want accuracy.

But you must also do your part by keeping your wrist at or near heart level and your body free of muscle tension each time you measure your BP. And no talking or fidgiting. This is likely where negative reviewers were having problems with accuracy and consistency. Follow the instructions to the letter and you will be OK. Also remember to use the same wrist each time because BP... Read more

This little wrist monitor with the small price works as well if not better than those larger, more expensive wrist & arm models. This thing could really save your life, since it gives accurate readings and could potentially alert you to problems such as high blood pressure and irregular heart beating (it did for me one week before the cardiologist and her heart holter worn for 24 hours did!). The storage allows me to store up to 60 (I think that's correct) readings, great for me because I have to chart my daily readings. It's easy to use...I use it at home, and at the office. Light and portable, easy, and perfect. I LOVE this thing, and it was so inexpensive!

It is very easy to use. I like the fact that you case store readings for future recall, such as when you go to the doctor. Is not at all bulky and comes with a great storage case for easy portability.