Works great and easy to use
All I can say is that it seems to work well.  I took my BP just prior to a doctor's visit and it matched exactly.  Occasionally it will seem a little off, but I suspect that has more to do with the level of the arm.  It apparently is very important it be level/even with the heart..  It also seems well made and is easy to read.  As long as it holds up I'll be a happy camper.  For the money it seems hard to beat.
Rating: 5 stars