I bought this game with all it's expansions finishing almost everything there is.
It's one of these games that feels to lengthy - it overstays it's welcome. Worldbuilding is amazing but relevant content in it, such as missions, characters, hell even the main protagonist itself, are all lacking. There is very few memorable moments in the game aside from amazing locations. It's a shame really.
I nearly 100% this game and it took me around 100 hours to do so. Even at the very end you are still discovering new stuff. Progression is good, and it feels much better in relation to previous titles. Also, combat was much improved - revamp was badly needed in my opinion as the old formula was becoming a bit stale.
In conclusion, it's a decent game that should have been much shorter and much more coherent.