Here's a selection of comments posted within the first hour or so... please feel free to add your own at www.manutd.com/talkingreds.
devil26_forlife: Absolutely terrific news! Not been this excited about a transfer since Wayne Rooney signed in 2004. The reason why this is a great deal is because it basically eliminates two big problems. Number one, we've got a great player like Van persie who on his own is good enough to destroy most teams. He'll give us even more of the x-factor. Number two, it takes away some of the pressure on Wayne. Remember that Wazza is 26 now, so it'll be better for him and the club if there's another superstar who can do the business. As for van Persie's injury record, I don't think that's an issue as he won't have the pressure of carrying the team like he had to do at arsenal. Even if he gets an odd injury, we've still got plenty of firepower to make up for his absence. So all in all, we've signed a world class player, the best footballer of last season in our league, and he'll give us 4-5 good seasons. Great news!
rvpunited: Hello everyone, I'm new to the message board... and I'm so happy it's untrue. Rooney & RVP upfront, the best strikeforce in the league by miles. I'm so excited about this season with some amazing signings.
Raphael Thomas: Wonderful news! A bit premature but congratulations to the club and Sir Alex. You have put a smile on every Manchester United fan's face. Now... let's bring home what belongs to us, especially the Champions League.
Big Mackem Red: Brilliant news - I was punching the air when I saw it. We've now got some serious firepower (Rooney, Van Persie, Welbeck, Hernandez). Kagawa looks a real steal - top quality. Really excited now for the start of the season. Also building well for the future with the signing of Powell, with some good young players coming through the ranks