Good Buy, Get this one.
Going to check it against my doctors, but so far it seems really accurate.  After being crazy disappointed by one I returned I am loving this one.<br /><br />For those using this on frail elderly, it's comparable or slightly less than the pressure and time you get at the doctors office, so if they can handle that this one shouldn't hurt them.  I saw a review on another product by another company where it had bruised the gentleman's grandfather so I wanted to address pressure.
Rating: 5 stars