Some weaknesses 1

The function and the GPS performance is broadly OK, the receiver runs relatively quickly and very accurately measures. The camera detects the receiver without problems and you can make is in the camera settings menu.
Disturbing is the very poor manual. It may be that you can get out of the machine longer, but the manual is no great insights on the use and the possibilities.
In addition, the unit switches off after a certain time and then you do not notice the GPS data are transmitted.
It is necessary to observe the operation.
In addition, the battery life seems very modest (I would say to the six hours for a day trip to almost)
Practically, the connection via USB cable, you can place the receiver anywhere (nice would be appropriate mounting adapter, I manage myself with a belt clip from an old smartphone bag works well)