I played through the demo 2 times and it took me less than an hour. I just wanted to check both mission locations (USA and China), turned out it doesn't matter - you get the same thing anyway.
So, the game is worse than i imagined.
First and foremost, it's an obvious console port. The UI and controls are terrihorrible. Expect big ugly TV friendly fonts, mouse lag, shitty textures, unintuitive menus, low-res cinematics etc. You perform most of your actions with the keyboard, not your mouse. Mouse is basically used for movement only. Nope, you can't just simply target your enemy with it, you can't shoot with your mouse either. Instead, there's a bunch of ugly icons, each representing an action you can perform, like fire, look around, take better cover, reload, use special ability etc. You cycle through your targets with the TAB key, and no, you cant just fucking use your mouse. Zoom level resets every time you change your soldier and it's annoying as fuck. Oh, and you can't rotate the camera freely, there are 4 preset angles, so you can easily switch through them with your fucking XBawks controller. Because the game was designed with controllers in mind.
There are only 2 missions available, the first is a railroaded, cinematic tutorial in which you're told exactly where to go and what to do. And the whole mission is 5 fucking minutes long. "You" kill a total of 3 Sectoids, and you lose 3 out of 4 of your squaddies. Everything in this mission is scripted.
After that, you get to choose the location of your base. You promote your sole remaining soldier, and you can choose to begin research on either better weapons or armor. It doesn't matter what you choose, because the demo ends after the next mission anyway.
The next mission will take you approximately 10 minutes to finish. You have full control over your actions this time, but it still doesn't matter 'cause the map is small and linear. There's total of 6 enemies here. 2 Sectoids, 2 Floaters and 2 Thin Men (in order of appearance). Once you kill everything on the map you're rewarded with a cinematic, and that's it. The demo is over.
The game comes with a DE:HR inspired soundtrack, retarded ragdoll physics and ugly graphics. But you can customize your soldiers' mustaches, so it's an instant PC GOTY. It's clearly the best game remake since this year's Syndicate.