Good game but filled with lag and other problems that make the game far from perfect. I got the game on the tenth when it came out and I have played it a lot since.
Pros: Beautiful landscape
Variety of activities in the open world
Story that feels intriguing like a TV show
Good weapons to pick from
Addictive
Reminds me of Skyrim which I love
Cons:
Nonrengerating health: You have to spend time collecting berries to regenerate it. Health feels like a burden.
Game lags if you play it for too long and will quit on you randomly
Confusing skill tree, even after playing for hours, it still isn't clear what skills and abilities I should be investing in
The color-coding of white and blue makes it unclear what activity is there until you come closer. For example, you could come across blue thinking that it's a side quest when you come closer and realize it's a boss or a hard beast to kill.
Not enough customizations for Eivor, there are only a few hairstyles and I expected more
Eivor is not an assassin and is only loosely tied with the assassins, thus the Assassin's Creed title is misleading
Overall, I would say buy it if you like Skyrim and Assassin's Creed Odyssey because this game appears to be a combination of both.
However, if you are looking for a traditional Assassin's Creed game where your character is an assassin, this isn't it despite the return of the hidden blade.
Edit: Dropped the review one star because the game didn't let me finish the main story.