I have, i had to prove to GP that i get 'white coat syndrome' and only have high BP at the surgery.
They arent too bad, at night the dont read it so often and it wakes you up briefly.
The only high reading i had was when the thing on my arm inflated and wouldnt go down, it got stuck for ages and i was screaming to anyone to try and get it off, suddenly it deflated. Luckily the monitor part of the system picked it up as a fault and i was given the all clear on my BP.