Garmin 2599LMT navi-D EU - from very good to mediocre

I have my old Navigon replaced in December 2014. In the near range while came Garmin and TomTom. Since the graphics (cards processing) Garmin Navigon similar to that of, inter alia, the decision fell in favor of the Navi 2599th
Positive are:
+ Bright, clear display with 2-finger zoom function;
+ Good representation of the cards, not overloaded;
+ Fast route calculation, empehlenswert: fastest route;
+ Good and easy to understand are the turn instructions including announcement of street names;
+ Good, but could be improved, the voice control;
+ Digital traffic allows clamp Information about the trip (no internet required).

Negative are:
- Voice control of the Navi while driving is only limited use, requires a very loud speaking the instruction directly into the navigation system;
- Route choice is not always clear;
- No residual Km display;
- The lack of light sensor for day-night switching, for example when driving through a tunnel;
- Suction cup too small, does not keep stable
- No buy recommendation for the fee-based radar info. To download the updates, an additional plug-in is required, is that not supported by the browsers Firefox and Google Chrome, difficult even when using Internet Explorer. In addition, the distances are inaccurate to stationary speed cameras, too far, that it is always flashed!