Six new faces have walked into Old Trafford in a bid to help the club mount a title challenge having only just qualified for the Champions League last season.
Two of the players he landed last season have already left for pastures new, so the Dutchman will be hoping his current crop decide to stick around for the long term.
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Van Gaal has now spent a massive £252.7 million on new faces since he arrived to replace David Moyes last summer, resulting in a squad that bears practically no resemblance to the one he inherited.
But who has been a success and who has been a failure? And what to expect of the signings just made?
Here, we rate all 11 players acquired by Van Gaal over the past 12 months...
CLICK 'BEGIN SLIDESHOW' TO SEE THE RATINGS