First things first, I applaud the makers of this game for exploring a historical period rarely (perhaps never?) touched on in gaming history. Truly, I enjoyed my time running around the English countryside. The countryside, while not exactly Crysis-level graphics porn, is still wonderfully rendered.
Now, let's move into the less flattering aspects of this game. The first problem I noticed about this game is the controls. Now you still move around with the WASD keys, so that's pretty standard. But to swing your weapon around, you would click on your mouse and move it to decide the direction of your swing. This is awkward because your mouse also controls your view, so swinging your weapon around means your view will be swinging around as well. Now you may point out that I can always play as an archer, but what's the point of playing this game then? If you're unsure if this is a game for you, play the trial (that's the free version on Steam) first. If it makes you dizzy, then this is definitely not the game for you.
The second problem is the balance of this game. It's not difficult to find a random dude lobbing everyone's head off with the Peasant Polearm (it's a rake...). Even if it doesn't result in an insta-kill, it still deals a heavy dose of damage. The swing speed is much faster than any axe. Seriously, what's up with that? If that didn't convince you, let me point out that the Longbow cannot kill a player at full health with an arrow to the face, regardless of range. If that still didn't convince you, then may you be killed by dudes dressed in rags. These guys can takedown a heavily armoured knight with their speed.
Eleven months (at the time of writing this review) after release, bugs and exploits are still aplenty. I just saw a guy rode a horse into a wall and disappear into it. The said guy then proceeded to shoot everyone in the back, and no one is able to get to him. FIX YOUR DAMN GAME, FATSHARK!
Again at the time of writing, I've clocked in six hours into this game. And I encountered three hackers. That translates to one hacker in every two hours. That, to me, is very serious. Note that I played on servers with Anti Cheat on, but I guess that is not working at the moment.
Bottomline: Try the free version, if this game is your cup of tea and you can live with the hackers and cheaters, then buy Kingmaker. Otherwise, forget it.