Anybody driving through Germany especially North?

I drove through Austria using HERE Sygic Truck and it did good job so I am wondering about Germany now...

I have never used TomTom navi before but downloaded 1.4 TomTom and installed some maps, been comparing it with Google Maps routing hmm not bad but still wondering what are you experiences driving though Germany using TomTom or Here and which navigation? I prefer Sygic Truck but I am open to any suggestions.....

Thx