Omron 7 series wrist blood pressure monitor.Summary:I feel it is an excellent instrument and works very well, provided one follows all necessary steps, see them itemized below.(though arm monitor might be more strait forward to use, but would require a short sleeve clothes):1. All the instructions provided.2. The cuff is tight but you can still squeeze your index finger under it.3. Your elbow is resting on a hard surface, so vibrations from your heart are not dampened by a soft pillow under your elbow.4. If you do everything right, and it will report 2 or more consecutive measurements that are not the same, it is likely due to the fact that your blood pressure actually changed. Note: manufacturer specifies +/- 2 counts of accuracy, and I believe it. This guarantees that if your BP is the same, you should not get a variation more than 4 counts. Note: not all monitors have such specification.5. My blood pressure improved enough from eating food that is not salted or is salted extremely lightly, that I did not need medication. And my medication had proved very detrimental to my health, so this was not a small accomplishment for me.Details:My objective was to buy a RELIABLE blood pressure measuring instrument that was EASY TO USE, so I can make measurements at will (hense a wrist monitor, instead of an arm monitor), and use it to give me feedback from foods I eat to blood pressure that results from eating those foods.Note: I already had a no name (not certified, like omron) wrist blood pressure monitor that worked well for me for some time. But now the old monitor was not being consistent, so I was looking for one I could trust. To qualify "working well", it means: when I just bought it, I made several measurements in a row, and they were all consistent. I then exercised, and repeated the measurements, and those were elevated, as I expected them to be.Before making the measurementI read all the directions and followed them. At least I am under such an impression. I am writing this review to possibly help the community. But some significant time has passed, and I am doing it from memory. And I don't want to re-read directions to verify if I indeed followed all of them. But from memory, I did. I specifically remember wanting to follow the directions and reading them.However, I was not getting very consistent results.I called the manufacturer's help number to see if they could help me find a fault with my technique, before returning the monitor.The fellow on the phone indeed had helped me. With his help I discovered1. One thing that was locking in my technique.2. One thing that was helpful for consistency.1.The thing that was locking in my technique was that the elbow is supposed to rest on a hard surface. This is because the instrument is trying to detect vibration from your heart, as you heart is doing it's job. Those vibrations are faint, and can not be muffled by something soft under your elbow.!!!!!!I wish that Omron would have explained this clearly in the instructions.!!!!!!I think Omron does say that the instrument is oscillometric, which means it works based on heart vibration (which definition I initially did not know). But I believe they stop there. And for me, it was not clear that it means I need to keep my elbow on a hard surface to allow vibrations to propagate better.2.The thing that was helpful was how to tighten the cuff so it is not too loose or too tight, which is an absolute prerequisite for a successful measurement. Namely it should be really tight, but I should still be able to jam my index finger under the cuff, but not too easily.After I followed all the directions, including the 2 new suggestions I had learned, then I was able to get consistent results.But I had learned several things that allowed me to deviate from directions but still to get consistent results, consistent enough anyway.The reason I wanted to deviate from specific omron directions is so I can make measurements in comfort and quickly.Here are my findings.Note: I determined these findings by measuring my BP under ideal conditions for at least 5 times, and then comparing those readings to readings I would get under less ideal conditions, of which I would also repeat 5 times.1.I could have long sleeve shirts and even a sweatshirt (this all happened when it was still cold, and I just found enough time to share this now, summer), but not super spongy sweatshirt, as far as sweatshirts go. But I did try to put my weight on my elbow, to "squeeze" through the shirt to the hard surface, so as not to dampen vibrations.2.I did not have to sit straight and upright. I was able to sit on my sofa, and lean on a sofa arm rest.3.My sofa has a soft arm rest. So I took a small, but kind of deep(ish) ceramic plate (for eating food), and placed it under my elbow, and leaned on it, to push it down, so it would not dampen vibrations from my heart. And amazingly this too worked, well enough, anyway.I kept that little pla...