As I am next to my computer and not in a car, I have not tried navit in practice yet, so I have a couple practical questions also:

1) Is it possible to display the speed of the vehicle from GPS? I cannot find anything in the settings. As I am indoors, GPS is not locked, so I do not know if it changes then.

2) How sound and directions work? I set a destination and set my position (not through GPS but manually, GPS is not locked), the route gets displayed, but I cannot find directions anywhere and the phone does not speak.
I found in this thread the following speech.xml content I am using.Navit does not complain, but is there a way to test the speech without actually driving around?

3) Is it possible to turn off points of interests from view? There are so many in my city (Prague) that I can only barely see the roads underneath them.

4) And the last one. If I take a wrong turn, does it reroute itself automatically?