The Red Devils secured the midfielder from Sporting CP in the January transfer window.
He has yet to score, but has already showed his impressive engine and passing ability in midfield.
And Van Persie was happy with what he saw when Bruno came on late in their 1-1 draw with Club Brugge in the Europa League round of 32 first leg away from home.
The former Netherlands international told BT Sport: "He was unbelievable.
"With top players you can straight away tell he has something to add.
"He is silky on the ball, he has the pass, he has a nice cross and shot.
"So a joy to watch."