Blood Pressure Question-- Dr. Q?

My mom uses the manual one, the one that the nurses use on ur arm and its dead on. Shes tried the digi ones and theres a lil descrepancy always. It takes a little while to get used to hearing the pulse using the Stethoscopes, but its pretty accurate and a lot cheaper than the digi ones.

Im testing my BP the last couple of weeks and my hubby does it after training him a couple of times.

I'm thinking of getting a digital arm one because I don't know if I could use a manual one... I never was good with understanding BP. The digital wrist BP monitors are easier to use, but I want to make sure I'm not wasting my money on a monitor that isn't accurate.