There's no question Van Persie represents United's biggest statement in the market since they paid over £30 million—and over the odds—for Dimitar Berbatov in 2008.
That deal offered spectacular value for Spurs. This one can only reflect badly on Arsenal, who have not only lost their best player but will see him strengthen a Premier League rival next season.
United, meanwhile, have achieved that rare coup of beating Manchester City and Chelsea to a big-name transfer.
In true Sir Alex Ferguson-era United fashion, they waited, and they won.
The prize is a proven world-class talent on the back of a stunning season, in which he scored over a third of Arsenal's goals and won every award going.
Who'd have thought, at the height of their rivalry, that Sir Alex Ferguson and Arsene Wenger would one day sit down and work out the transfer of a world-class player between their two teams?
That's what happened. And you have to assume it either means Van Persie always favored United over City, or Arsenal refused to countenance losing yet another player to Sheikh Mansour's blue revolution.
Either way, United will now start the new campaign with the league's two most prolific scorers last season in their ranks—Van Persie and Wayne Rooney.
Will they gel together? Why wouldn't they? Both are intelligent players, capable of filling a number of roles, and each will surely feed off the other being beside him.
Will Van Persie be a success at Old Trafford? If he can stay injury-free, there's every reason to believe the Dutchman can thrive alongside the likes of Rooney, Shinji Kagawa, Paul Scholes, Nani and Ashley Young.
Ferguson's teams have always come with a default attack setting. Van Persie will fit right in.
United fans have already worshiped RvN, in Ruud van Nistelrooy. They will quickly learn to love RvP.
It's been a while coming, but United have finally made a bold move in the transfer market to appease their millions of fans.
Maybe City pushed them into it? Maybe the Glazers were looking to win back favor after their controversial decision to float United on the New York Stock Exchange?
Whatever the motivation, United have achieved the biggest coup of the summer in signing Van Persie.
If all goes to plan and the red half of Manchester reclaims the ascendancy, United fans will be glad Ferguson waited so patiently for the right deal to come along.