I think a lot of the hype is his age, and that he came through when Milan were at a real low point and desperate for anything to get fans back on side. He's clearly got the stature and in ten years he'll be peaking with a phenomenal amount of experience, but I'm unconvinced he'll be as good as Buffon.
Had no idea the fans detest him, tbh, assume that's because of the contract shite last Summer?