Riding in Montenegro

Mrs MRS has been on holiday in Montenegro and is keen to go back in October with me. Does anybody know what the bike riding is like out there?
ROAD < Scott Foil HMX Di2, Volagi Liscio Di2, Jamis Renegade Elite Di2, Cube Reaction Race > ROUGH
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Looks pretty spectacular to me.
Not yet experienced it, but have a tandem tour planned there this year. All research points towards fast, beepy drivers, but nothing too bad. Roads can become not roads with little warning away from civilisation.