The Dutchman scored a fabulous equaliser to cancel out Damien Duff's opening goal and generally impressed as United edged out the Cottagers in a five-goal affair.
Van Persie told MUTV: "It was different, of course. I came here a couple of times before but I always liked this stadium, the size of it. The pitch is big, the pitch is always nice. Now I'm a United player, everyone knows that and I'm looking forward to this challenge. The fans have been brilliant today, supporting us and they gave me a very warm welcome, so I'm very pleased.
"It was a bit nervy, but we held on and the main thing was that we got the points today, so that's out of the way and it was a good day in the end, a good three points."