Much better than I thought!

Had been a FT7 Polar used, this has for whatever reason (with the correct user information) up to 30% differences in calories compared to the display on the exercise equipment display.

When M400 as 10-50 calories difference are (at 1h), which I'm quite satisfied.

GPS is found very quickly, provided the clothing does not slip permanently on the clock :)

Wearing at 24/7 is very pleasant, although I have worn for years no longer clock, thanks to mobile.

Small flaws were:
- Synchronization with my Iphone does not always work the 1st attempt. BT off and on again and restart, then it usually goes.
- The Polar Flow App (IOS) can not be started without an Internet connection. or if the app was closed, they refused without successful login the start - has to do with the clock itself first less.

Extremely positive were noted:
- Charging via a standard micro-USB cable practicable everywhere!
- Curve course of HF, pace and distance (depending on the sport) via web / app.
- The free define the display !!! For this purpose, like a 6 star!

I have for example shown in Indoor on the first screen to pulse, the RF zone, calories and time!
This had annoyed me by the FT7, which I get calories only buttons - so while swimming and not at the time even on buttons or Heart touch.

Ultimately, the difference with the FT7 is comparable as a Classic Mobile Phone (FT7) with a Smartphone (M400)

Desire to Polar would: synchronization between Polar Personal Trainer and Polar Flow, then everything would be perfect.