So I find the super part. I was looking for a cheap starter instrument in this product segment, since I was not sure if I'll actually use something permanent. I have it now for a week and I find it as I said great. It can be worn discreetly under clothing or on the underwear, so it speaks a not equal to any of it. If you want the that's okay, but I wanted it just to try only invisible. Also for the night I do not need a bracelet, it is easy to attach to the sleeping clothes and works well. The records are certainly not to be compared with those of a sleep laboratory, since it actually responds only to the movement of the whole body and can register any farther values as pulse or eye movement. I guess I can see how many times I moved at night and it then pulls the App conclusions about the depth of sleep, one must here certainly do not expect too much. A big advantage in my opinion is that the device must not be recharged, so a button battery is running is to keep 6 months. Obs is true remains to be seen, so far everything is okay. The best thing about the whole thing, however, is the app you can upload for free on your mobile phone or even need because of the device itself can not be seen indeed all too much. In the app you have everything at a glance, can see how fast you went and if you look at internsiv moves asks the app if you have completed an exercise, which you want to enter. -cool- Goals you can set, which I look at the pre-set 10,000 steps a day to be exaggerated. But one can specify individually for themselves. The app also has a food diary which I also been regularly used. I had also already made with another app and I can imagine that many will be too complicated. It is particularly difficult when one is consumed no ready meals but often cooks for recipes with many ingredients and contradicts my opinion the idea of a healthy diet. But all in all for the price a great little device with cool app, which is probably not really need but still makes fun and motivated, so I call it the title affectionately known as "toys". Negative I find the advertising for this device because as here many also have other written are simply not a realistic picture of the device again. But so happens to be advertising ....