I can't say it was perfect because I had some minor issues with the camera... But other than that, the demo was great. In fact, it was MUCH better than what I was expecting.
The controls were good, the weapons interesting and the gameplay was pure motherfuckin' fun.
Before this demo I was like: "meh", but now I'm gonna buy this thing day one.
My Youtube channel in broken English: https://www.youtube.com/channel/UCW_sx27Sp5K6jfyA0vR0ofg