Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gift for Brother

I bought this for my brothers family as they have issues with BP. The first week he had it he was using it and logging the results. When he went to the doctors office they took his BP and said that it was 20 points higher then he had read not 30 mins earlier at home. So he went and got his meter and they check it again and found that his did read lower. So they did a manual check and found that his was correct and there office meter was out of calibration. It seems that my brothers high BP was not there and they stopped his medications. This also prompted reveiws of other patatients.