I just found out I have high blood pressure and bought (at my doctor's instigation) an automatic OMRON blood pressure monitor.
They are fascinating. Just whip the sash around the left arm and hit the "GO" button. It automatically inflates and in a few seconds gives you blood pressure reading and pulse.
But it intersting to see the changes according to stimulous ... petting my cat Harley (pressure down) ... thinking nice thoughts (pressure down), listening to the news (pressure up), posting on FR sometimes (pressure up).
I wish I'd gotten one earlier. I got HEM-711 model.