I have found this machine to be useful, but off by about 5 points when compared to other machines at The drugstores. Still overall it is a very useful small and convenient blood pressure monitor that travels well.
As a retired RN I found this device to be accurate when checked against my manual device. It is accurate, quiet and easy to use and provides great feedback for proper arm placement for accurate reading.
I bought two devices of that version, liked it because can set it to be work only while in correct position and I compared it with arm nercury sphygmomanometer and the result was not big difference (less than 10 for systolic and less than 5 for diastolic reading).
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