I saw him a few times last season, including the game where he scored four on Milan and the hattrick away to Fiorentina, so I probably caught him on his good days mostly... but then again, any 19 year old who scores three hattricks and 16 goals during his debut season in Serie A would have to be pretty special.
I can't say for sure that he's going to make it but he seems to have everything in his locker to succeed. He's almost 6 ft 2 tall, he's quick, very technical, creative, seemingly at ease with both feet, takes a mean freekick and has already developed a good sense for goal at a very early age. Supposedly has a steel mentality too. If he had been coming through in Spain or England there would be no end to the transfer rumours this summer.