I have an Omron and find it useful in managing my health. When I start feeling really lousy, I check there first to see if something is going on so I know what to try. For example if I am suddenly dropping 30 pts in BP, I go for more fluids quickly to try to keep from getting worse. If my numbers are in MY normal range, I either keep going about my business or decide to rest. Over time, my body has gotten used to higher HR as my normal, so occasionally I am "surprised" to see how high it has gotten when doing a reading and I try to make adjustments. Like Morgan, I used to be a bit obsessive checking at the onset of POTS but I found that made me crazy so now I only check if something starts suddenly going wrong. My Omron (without print) has measured my bp in the 180's and as low as 70's but will error out below 70. Also, it has registered my HR in the 140's so I don't have the same experience as Morgan. I think my monitor cost about $60USD. I made the mistake of buying a wrist monitor to keep in my POTS bag in the car. It is useless! It gives strange readings -- even for me-- and will vary greatly. I don't trust the BP readings but the HR is good, although I can check HR with my watch. good luck with your decision.