For those who get the Blu-Ray, there are a ton of extras. There is a commentary track on the R-rated version of the movie, about an hour of behind-the-scenes and making-of featurettes, about 20-minutes of table reads, a two-part gag reel, deleted scenes, and over an hour and a half of extended and alternate scenes. So, you get a lot of bonus features if you like watching them.
Overall, the movie is good, but not as good as the first. It does have some funny moments for sure, and Christina Applegate is great in it, but I do not think it is as consistently funny as the first movie was. There were some good additions to the cast including Kristen Wig, James Marsden, and Megan Good, and there are a bunch of character actors that you see in many of the SNL comedies and Apatow's movies. There are also a bunch of cameos from A-listers including Will Smith, Liam Neeson, Amy Poehler, Kirsten Dunst, Tina Fey, Jim Carrey, and more. The movie was definitely commercialized and did copy some from the first movie, but in general, I would say if you liked the original, you will probably like this one too.