It is among the blood pressure monitors that have been checked as reliable on the following page https://hypertasi.gr/UsersFiles/Documents/Pistopoiimenapiesometragiametriseisstospiti.pdf. It does its job more than well for a home blood pressure monitor. It is user-friendly, fast, and durable. It has detailed instructions on how to take measurements, such as body posture, hand position, placement in a specific spot, and many more, in order to have reliable measurements. As a company, I really like it because I have other tools from this company. The manual is available in multiple languages here https://www.libble.eu/braun-exactfit-bp-4900/online-manual-252263/?page=0005 if you want to take a look (page 57 and onwards), but it is also available in Greek, just like the device.