I had a $120 BP monitor but it turned out not to be good enough due to the degree of my autonomic issues and would drive me crazy with all the erroring out it would do if I was standing upright . so often I was unable to get any reading due to my heart beat going erratic and it seemed to be going a lot lighter some beats (it was highly variable). Anyway.. that monitor couldnt handle me, 2 other BP monitors of other peoples I tried in the past had the same issue with me. As Im starting a new med for my BP issue and POTS, the doctor told me to monitor things well.. so Ive brought myself a top of the range monitor.. if this hadnt worked the only other option for me would of been one of those very old style manually pumped up ones in which one also uses a stethoscope. I rang my health insurance to see if they would cover one (big debate with my boyfriend as he believed they wouldnt as they didnt mention they do anywhere).. and they said they cover $95 of any BP monitor.. so with that decided to buy another and see. The top of the range one I got told was "Omron" brand one (model HEM-7211) .. cost was $155. This one didnt have the normal BP monitors warnings in the small print saying that they may be unsuitable for people who have arrthymia like most of them do (or they may not even warn they dont work under such situations!!) but comes with an irregular heart beat feature and states Yippee..so I finally had come across a monitor which even on heart beat issues could still often give a reading (it has an accuracy of within 3mmHg). My pharmacist told me he'd never known a person who had issues getting readings with one of these. I got it home and have spent the last 24 hrs testing it out and its great!! It hasnt errored out on me once. Last night in middle of the night my BP was 100/52 when just awaking and laying with my support stockings on.. I sat up and my BP instantly jumped to 144/124 with the irregular heartbeat feature coming up (I also had a hot flush due to that very high spiked BP).. With all the my previous monitors.. I would of been left at this point with no reading and no idea at all on just how wacked out my heart or BP had gone. I had no idea before now that my BP was shooting madly up (diastolic jump from 52 to 124) just from sitting up when my BP is low... I'd only assumed my heart had gone irregular at such a time. It also gave me the heart rate still (which it has a accuracy rate of only possibly being out up to 5%) I also discovered last night that my heart rate increases 20 beats per minute and sends me into tachycardia..right after a food binge and it takes 2 and a half hours to come back down... (I dont know if it only does that when I eat carbs as I broke my diet last night). Im going to be trialing my new monitor tomorrow without having my support stockings on and see what difference that makes or not makes to my readings. Other things this monitor has is a dual check system and also a movement error detection too (thou I wont be needing that as I always make sure im still when doing readings). The cuff on my other monitor was a very good cuff but this one feels even better. anyway.. Im so happy Ive finally found a great monitor.