Having won so much "18 trophies" at Real Madrid, moving to a team that's struggling to find it's bearing seems taking several steps backwards. Career wise, Casemiro has won it all, and at this stage of his career, seeking a new challenge doesn't seem out of place.
From The financial angle, his wages have been doubled, but to whom much is given, much is expected from. Man United needed to make a statement and show ambition, and getting Casemiro, a proven winner and big name signing will do the club alot of good and also restore confidence inside the dressing room.
The presence of fellow Brazilian "Fred" and former Real Madrid teammates Ronaldo & Varane will help him settle quickly, so I expect Casemiro to be an instant hit in the world's most glamorous league. Do you share my views?