I have a few sentences written in the comment to Beitag of "Thomas". The unit I bought at Epson with the publication in September 2014. The heart rate monitor I use at home on the treadmill. iPhone 6 (all updates) stuck in a bicycle rack on the boom. I have the impression that it is getting worse. Meanwhile, I lose the Bluetooth connection between. This has nothing to do with correct or incorrect seat of the bracelet. It is helpful then to finish Bluethooth and new turn. This is sometimes - and sometimes not. In this case, close the app and restart. Very nice while running. Meanwhile I skip that and rely on the number of blue LEDs on the wristband. The treadmill is outside the home Wi-Fi area. One should not forget to read the clock by app previously. Does he in the gym over 3G I can the heart rate monitor only times forgotten. Sometimes it takes 5 minutes to bring the part to the start. I would never buy a device that synchronizes with a server elsewhere, rather than directly to the app. This has nothing to do with privacy, but with everyday practicality. I would strongly recommend to reprogram the app in this direction Epson. This is nothing else. I'll sell that thing for Christmas on eBay Recalling local reviews for little money. My initial correspondence with a service point in the NL is also eventually fizzled. Conclusion: infinitely lazily through the synchronization via WLAN or mobile, infinitely slow when back and forth wipe in the app itself, unstable Bluetooth, accurate pulse measurement (second star), so it latches because, acceptable pedometer. Firmware Update bracelet and generally new app with data storage in the smartphone directly I consider essential.