Real with Schuster is building a really nice team in my opinion. They have a few great players like van Nistelrooy, Sneijder, Robben, Raul and few youngsters like Higuain.
We can compare Ronaldo to Figo (at his good age when he moved to Madrid from Barcelona). It was a good step for Real, but then he was really needed there. Real at the moment does not play with classical wingers. The only one that plays this style is Robben.
Ronaldo may be also used as a strikers as he scores many goals.
Player of his quality is definitely a good choice, but the question is about his team spirit. Will he be able to adjust to a team where he won't be the most important player on the pitch.
If Schuster decides that he will they can get him.