He looks a class act to me.
I've seen him play against us twice and I think he's scored 2 goals and bearing in mind they don't have much possession, you have to give credit to him. Of course, there's the joke about his age but for 19 I can't think of many better players who can play centre mid like he can. He's played 100 games for Dortmund already. He didn't look out of place when playing for England. Honestly, if someone said he was 28 and would you want him at City I would. For 19, it's a no brainer to me.
Will he improve with us? Assuming Pep stays, it's impossible to imagine he'd stagnate. I think he could become a world class footballer under Pep as he has everything. He's quick, good stamina, great passing, good tackling, pretty tall and reads the game well.
I'm sure we could offer them a pick of talented youngsters to sweeten the deal. I'd be gutted if he went to Chelsea or Liverpool as I think he will become a brilliant player.
Is he worth £100m? I think so.