So far, it鈥檚 been accurate. Even if it proves to be off slightly from my doctor鈥檚, this unit is so much easier to use. It鈥檚 a lot more practical for someone on their own and anyone with larger arms who struggle with the arm versions. Last arm one I tried was such a fuss trying to get the band around my arm on my own. This one easily wraps around your wrist, the digital display is large enough to read even without me glasses. Most importantly for a wrist type version, this one will not activate unless you raise your wrist so it鈥檚 in line to your heart. This ensures a more accurate reading. Unlike other brands of equal or lesser value. It also includes a hard case to store for safe keeping at home or while travelling. Very compact and can store readings for 2 different people.