Im from Slovenia and im using Sygic Europe navigation software for iPhone and Android. I can tell, that the coverage of Eastern Europe with Tele Atlas maps are very poor. There are fake roads, there are new roads from year 2008 and this roads are not in the 2011.03 map from Tele Atlas....
The same thing is for other Eastern Europe countryes (Croatia, Cheze republik, Bolgarija, Bosnia and Herzegovina, Serbia...).
Sygic will be very EXELLENT navigation, if they were using:-
- for Western europe (Tele Atlas maps)
- for Eastern europe (TopMap - local provider)
They should use it together (combined), like iGo using Navteq maps for WE and TopMap for EE.