+ After several months of testing, no problem the device is much more reliable than the previous model no battery synchronization bug ... for now LOL, the night mode is excellent I can do without it (for Deep hours), the running mode is also excellent, less the binding mode food all go I not use it.
- The button is a disaster like the model before it will quickly lose little tip after I put a little piece of transparent tape and voila it avoids buy caps at 15 euros for 3 !!