The first thing I noticed with him as a young United academy player was his presence and self confidence. Always able to create magic out of nothing, often in the middle of the heath. Great technique, stunning ability to hit the ball both on the ground and in the air and a impressive physique.
I was very disappointed when he left us for Juventus.
A couple of years later my impression of him is the same. A little bit more matured, more experienced but still he has this special aura around him. Like a young Prince who knows he some day is going to be the next King.
He's not a playmaker, nothing special as a defensive mid but as a b2b with freedom and energy to drive 30-40 meters in full pelt he's a monster of player. Good in the air, sensitive passer and great one on one.
Taking all in to concideration he's soon going be a world class player, probably on of the best in his position. Almost there. He's one of Adidas future stars. He's a cool guy with style and grace. A marketing dream boy.
Judging his economical value is very very difficult. Lots of different factors to take in to concideration.
As a player he's in the same bracket as Kroos, Racitić, Verratti and Alcantara. Probably worth £50-60m upfront. Only 23 years old add his value another €10-20. Poster boy for Adidas and a idol for many young men (and women) probably add another €10-20m. So without competition from Real Madrid a fee between €80-100m shouldn't be far off. If we're interested in him then I suppose a initial fee of €50m would be expected, two installment of €15-15m in the next two years and then a final €20m depending on adds ons and then I think Juventus are tempted.
With Mino Raiola as a agents I expect his wage demands would be close to 200-250k/week, split regarding image rights. A 6+1 year contract would be suitable regarding the fee.
That's my take on this. Probably I'm up in the clouds but neverless I decent shot IMO.