Entry device!

First of all, this is my first fitness thingy, so have no experience and no means of comparison.
Inspired by the now current issue of c't (6/15) I have summarily ordered the thing same. For the price and the praise of c't you can not go wrong indeed.
Was delivered a box with tape, Core and charging adapter for USB. The printed manual was purely Chinese. Wurscht as Bayer says. Charged (she was actually already nearly full), assembled and ran to his left wrist. I have very thin wrists and since she does quite well. The bracelet itself is ok though, but I do not think it holds year. No Matter.
On my Galaxy S5 I then installed the app (which wants to acquire any rights !!!. Registration with mobile phone number!
You app is first English with all kinds of mix of Chinese. Think that this will improve with updates.

I'm not a fitness person, but want to know how many steps there are but a day and recording the phases of sleep.
For this, the band is well suited. The battery life is excellent. According to c't that thing holds with a cargo 30 days what I can confirm.
The clock accuracy step count I have not checked, but think that it is quite ok and me it comes down to the record for weeks and months and their comparison values. The sleep phase recording, however, is plausible.

So if you want to try it just once can do in the MI for little money, without having to go for about 80 euros and constant charging in other regions.

3 stars because:
- Bracelet lacks something possibly longevity - not a problem if you could buy more the black for little money, not
- Software and App ok se, pure English would be first or better for me not a problem
- Appberechtiungen are so exaggerated

Otherwise, the part is not bad,