Buttner Joins United!

A rather shocking signing from United today as Dutch left back, Alexander Buttner joins United for 4 mil. Apparently the club has been following him for a long time, and had to snap him up quick so other clubs like Fulham wouldn't get his his signature, but i'm hearing from a lot of Dutch sources that he's not good enough for United. Either way it provides more options for United, and will not only allow Evra some rest throughout the season, but it will also push him to do better.
What do you guys think of this transfer? Is he needed at United? Will he be successful? Let me know below!