I also saw this movie on CN. I thought it was good, but nothing special. I personally found May's lullaby annoying, and I was about to fall over and die of embarassment when they all "sang" it at the end, especially because my (older) brother was around. It was a bit too corny. But I do like the fact that they actually kept May's japanese voice for it.
Butler was a great character, Team Rocket had some good lines here and there, and Max and Jirachi's friendship was adorable (as was Jirachi's voice). I'm glad Max got more of the spotlight instead of Ash, even if he's not a character I like.