Looking for some advice from you all please.

Just bought a Tom Tom Rider V2 with UK & Eire maps cheap. Needs repairing, but would return my outlay once done, so that's fine by me. My real concern is will it do the job I want it to do? Will be in Europe later this year on the bike and looking to travel into the Balkans/FYR. But looking at the eastern Europe maps for the Tom Tom, they only seem to give basic coverage for this area. The most recent maps for IGO seem to give better coverage, and I have to admit I don't know what Garmin would be like.
Any help would be most welcome.