Finished the missing link now. It was good, needed a few hours. Steam tells me 83 minutes, but I doubt that this is correct. I was playing for at least 4 or 5 hours. The dlc felt to me a little bit like a longer version of the police station infiltration quest in Detroit, but more difficult. Don't know if there is much more choice&consequence in the dlc than in the main game, though. Also people said that the dialogues are bigger and better and stuff, but I find this not to be true. First, because there are just a few dialogues and second, it just felt to me like in the normal game. What I have noticed, though, is that various people have reacted on my "don't kill anyone"-playstyle.
I think it's a good dlc. Worth the 10 euro? If I would be sure that this is 100% new content, then yes. But I feel as if I have played something that should have been in the main game.
Also I really wish I could combine this with the main game... It's a bit bleh that it works as a stand alone game.
Now let's wait and see for future dlc content.