After several hundred hours of the game, I think it's time for me to make a comment.
Honestly, this is a really nice game. Whatever you are a history buffs or not, you will find a lot of fun in this game through the familiar world and unfamiliar timeline. In this game, you can try to create the history not just modify it.
However, I have to warn to everyone who wants to try this game. The DLC policy of this game is really terrible. Yeah, the game updating for 6 years is great but the high price of all of these DLCs will frighten the new away from this game. The game is totally different from the 5 years ago and all the price of the game become more than 10 times to the origin. I don't think the game now is worth to this price.

Score and reason(5 for full score)
Graphic 3 This game was developed 6 years ago.
Entertainment 5 It's really fun for history buffs. If you are not, that might be 3 or 4.
Operation performance 2 Only one core is active when you start the game. You need to have a great CPU instead of a great GPU.
Price 1 It's a disaster decision for Paradox to have such a price policy. If you don't purchase the DLCs the game will lose a lot of fun.
Language support 1 People from some non-letter language people will have a sense of this. If you wanna have a Chinese or Japanese, you have to modify the game files first then localize.
Game service 4 In the most situations, the official staffs try to listen the players' suggestions.
Update 5 Can you believe it? This game has already updated for 6 years and it will continue for at least 2 years.

I wish this will help you.