I know that he's good IRL, but I didn't manage nor bought him. A little warning - I always see him being sold (mostly to PSG for about the same price you paid), and his average rating is 6.5 every time I take a look at him.
Some people here have said that he's worth the money, and that he played well for them, so I want to know in what position and role did you play him? I ask this, because in one save I wasn't certain on whom to buy - Mkhitaryan or Adam Maher. They cost about the same price, and I went with Maher. He was very good for me, but I would also want to know more about Mkhitaryan in case I would buy him in the future.