After the Medisana sphygmomanometers arrived with me, I had to also test the same. The packaging itself has fallen quite large, but the actual device is pretty small. The beliegende small bag is very convenient and also accommodates the included USB charging cable. Exemplary enough, was to attach an extra charge adapter omitted because these days almost everyone who uses a smartphone also has such a part. And if not, you can also connect it to the PC for charging. And then of course, the first test was made. First, the blood pressure was the old large and bulky sphygmomanometer (that has proven through previous test at the pharmacy that it accurately measures) measured and immediately thereafter with the BW 300 of Medisana. And unlike other reports deviated from only the systolic pressure to slight 1 mmHg. The diastolic pressure and the heart rate were identical to comparative measurement. Schön is the additional display at the traffic light color scale, the one immediately tends. Also an indication of excessive movement or speaking is integrated during the measurement, since these actions influence the measurement. About the Arrhythmia indicator (arrhythmia) I can logically say anything because this was not the case with me. Must emphasize praise you also that the measure already drastically shortened the total measurement time during inflation. And now followed the pairing with your smartphone (Galaxy S5), which was absolutely no problem. The disturbing for me was the compulsory registration in the VitaDock + app. Clear, without registration, nothing can be transferred to the portal, but that will not stop everyone. Otherwise, the app is a nice start. However, overall I lack the ability to delete individual values. And I see it as extremely important because the first test was to measure the default date of the device, so the 31/12/2012 23 clock. And after the time and date were provided, of course, was also tested with the two possible profiles and promptly uploaded to measure the other person in a profile. Such things can happen at the beginning and something I want to also delete (and other erroneous measurements when the device gets into the daughter finger :-). The app itself I only use to transfer the data to my online account at the moment. Since much remains to be improved, since the online account is to better serve and clearer evaluations supplies. Also I do not care that there is a balance, a pedometer, etc. in the app. If I did not, I want to hide it. But despite my criticism, I am using the device more than satisfied. It is extremely light and extremely quiet while measuring.