Yup, it's great, I used it as well. Just used the routing for jeep touring (using the mountain bike profile) and specifically routing through some places. It works great with offline maps. Also one could just download parts of a jurisdiction if it's bigger, like Northern Greece. The maps are bigger but also contain more information than Here which seems dated, lacks some newly built highway segments in Eastern Europe and will route you on national roads instead.

I read a story about some people who used Google Maps for routing in the far Eastern part of Russia, got routed through a disused road and froze to death. My in-laws were also using Google Maps when they were routed to a different place than the hotel we were supposed to stay in in Serbia, but the locals were kind enough to guide them.