If you are looking for a WWII Strategy game stop searching. Almoust perfect if it as no bug's and "gaps"
Is complexity is amazing in every aspect! The units cannot be more correct in therms of historical reality, the logistical aspects despite some gaps are also superb, and the tactical reality is behind common.
However despite it is the best you can find you also have some issues. Bugs start to became normal if you play it some time, your logistic sometimes get some incomprehensible gaps, and the air theatre complexity could be dramatically improved.
On the tactical level it has only one problem that is the fact of side with players with "offensive" inclinations. Nothing that in a hypothetical HOI4, Paradox does not fix.
But if you are a graphics addicted you will get disappointed because of the not very "clear" map image/graphics like in Making History for e.x. Then, if you like geographic accuracy you will find some blunders that can inclusive change the course of war.
In conclusion, despite all those small errors, this is a game that if you are a strategy enthusiast you will not regret after buying it.