I haven't played with it for a while. The best I can do is bug reports The xml files aren't bad, once you get used to them, not very user friendly though.

My biggest problem is lack of accurate maps for my area. I do keep on my tablet, just in case. It could probably get me out of trouble if necessary (maybe not quickly or accurately, but eventually). I think with gerritv out of the picture for a while, the tablets don't have a real advocate working with the Navit developers. I'm not sure what they've been working on lately in that regard, I haven't kept up.

If you have any other questions, I might be able to help.