I have used many bp monitors and wrist bp monitors earlier. None seemed to be accurate. But this one is far better than the earlier ones.It Is very easy to use as everything is clearly mentioned and labelled on the calf strap and manuals.. The adapter option is the best feature in this price range. Immediately after purchasing it i tested it on my 11 family members and the results were very accurate.Its a complete VALUE FOR MONEY purchase.Anyone can buy it without any worry.