Great approach, but nothing more.

I have received the device today, and the first device also worked perfectly. I could read all new SMS messages and calls without problems. But when I wanted to use the unit as a watch and my cell phone was in his pocket, broke the connection and could only laboriously restored with a complete pairing process. Even after the connection was re-established, you broke off when I only 1 meter away from my phone. Also, the manual did not contain any evidence that I'm doing something wrong. Some other attempts to keep the connection were unsuccessful. In some cases the connection broke down even though Live View was right next to my cell phone.
Second gripe is the bracelet. Optically not exactly appealing. A mixture of Stretch, Velcro, a plastic buckle and scratchy polyester. Definitely not comfortable to wear.

Conclusion:

Here's an idea of ​​which one definitely could have done more. As it stands now, the part is simply a "relatively" expensive dust collector.