Yet to try it but sounds good!
The setting is a bit of a problematic with these. Since the whole sector is populated and there is commerce going on between the systems all the time, it's strange that the player is not able to see the whole map. And to think about it, the whole witchspace travel system probably requires known destinations.
Anyway, I love the exploration idea. It's just a bit weird to explore the known part of the Ooniverse.
Perhaps all the route details are held by the big trading companies (not every trader need be independant) and they don't want any Tom, Dick or Cobra pilot undercutting their lucrative business.
However, not knowing the system government in advance makes travel potentially much more hazardous...