Works quickly and easy to read. Takes 3 seconds to turn it on, then 5-10 seconds to calibrate and start recording. ECG is visible on the LCD screen while it is recording, but cannot be reviewed on the screen afterward. Must sync to the SonoHealth app to review the full recording. Default recording length is 10 sec, but can be increased to 30 sec on the app. It does a fair job of interpreting the ECG and can identify many abnormal rhythms without paying an extra fee. But uses “arrhythmia” as a catch all term for afib and other irregular rhythms. It does not identify short runs of SVT.Pro: Works quickly and easy to see Leads I, II, and V depending how the device is held. Easy to sync to the app, but no need to be synced to make it work. Provides many more diagnostic interpretations than other devices including ST elevation that can occur with a myocardial infarction. Would be great in a physician’s office to screen a patient in 1 minute. Charge lasts a long time. Easy to clear the device memory with the app.Cons: Screen scratches easily, so store in its case. Does not identify all abnormalities, so it is helpful to be able to read an ECG. If there is any doubt, the recording can be easily emailed from the app.Overall: excellent value for the price and easy to use. Highly recommend for individual’s monitoring their own heart rhythm and clinic offices as a quick screen to see if a 12-lead ECG is needed. Customer support is excellent.