I first wanted to buy the instrument from Withings, because I have already the scale, but read reviews after I gewurden attention to this device. The decisive factor was the display, which indicates all values, even without Smartphone. United are currently all devices (cuff 14.5 cm), so I am additionally for one decided that also has arrhythmia. I especially like that the bag is not so small that you can accommodate everything easily. The handling is very simple, if you have set up your machine for now. If you have even a 2.User you have after you have unlocked the Locktaste, the M button pressed for 3 seconds, release and press again to display User 2 or guest, and then press the S key to the To confirm selection, then start on the center to the measurement. The guest measurement is not saved !! The connection to the Smartphone works very well, you just have to launch the app, and then tap Connect, then it'll go, so I had no problems. The app itself I find not so great. Which brings me in a blood pressure measurement Wochendurchnittsanzeige ?? Nothing !! The app is designed for all Medisanageräte, not only for measuring blood pressure. For me, the app is confusing, who has all the Medisana devices such as scales, Fitness Tracker and what there still may be so, certainly very acceptable. Conclusion: Super display and simple measurement, app used to!