First, the device can also be located only with costs only about Garmin ... and then from the 2nd year. If the device is to record tracking points will cost the whole fun almost immediately 5 euros per month and this also only works on a Garmin Map.
Put battery life with continuous tracking points - as much as 10 hours.
Either the map of Garmin which is provided for locating available is inaccurate or the unit inaccurate. But in the open air about 20 m next to a main road although the device exactly is on this and not even moving is ... well just flawed.
Otherwise, a well-made device which could operate safely without shackles better why you have to earn at tracking money is a mystery, as there are currently but better alternatives like the miniHomer or the like which are at any time to locate free via Google Maps and also tracking points set.
If Garmin and updated accordingly nachbessert sure a device with a future EHR otherwise not ... artificial pruning of possibilities is always punished.