Turn is reported too late

had this device for a few weeks in operation.
Which reminds me is very negative noticed that sometimes the turn is reported too late.
That means that sometimes only a few feet from crossing the turn is displayed.
This is for me already a dangerous situation is because you still at a two-lane road
Welcome to the right lane to turn, which it will easily lead to accidents.
What good is it if 600 m before the announcement already but is not 20 or 30 meters before man must turn.

Strange is also that it is sometimes the way it should be done properly (20-30 m previously)

Have resold the unit.

And poor customer service to:

Had informed twice the KD Garmin this problem, but there was no answer to.