The Madagascar 2 movie is a great flick, full of fun and witty lines. If you liked the first movie, this is more of the same, if not better and probably worthy of five stars. The second DVD featuring two Nick Penguin shorts for a total of about 25 minutes of video, isn't worth the additional cost, in my opinion. The first Madagascar release had a Penguin animation short included as an extra on the movie disc, whereas the new one has two shorts and charges the buyer for the priviledge.
Dreamworks' animated films have not been able to hold a candle to caliber of Disney/Pixar films, but let's face it: who can? That said, Madagascar 2 is learning from Pixar at the very least. Animated films work when they are able to successfully blend humor, heart, and a good story to keep the audience sustained for at least 90 minutes.
Madagascar 2 starts in the right direction by presenting a very nice opening featuring a brief origin of Alex and how he got to New York. It's probably less than 5 minutes, but already set the tone for the heart of the picture, which focuses chiefly on Alex fitting in with his fellow lions. The other chief characters are also stumbling as they interact with their own in Africa.
Also back is the humor. I sometimes feel like the movies would be funnier if the penguins had more screen time, but they are still funny in whatever scenes they're in. The granny who beat up Alex in the first film is also back for some humor. The humor is better and more consistent than the first.
The only flaw in the film is that it is fairly predictable. The chracters are a little bit better here than in the first and it has a good heart, but sometimes they don't spend as long on the emotional aspect as they could. It's still good entertainment and I like to see Dreamworks progress with their films.