Absolutely Terrible. The plot is paper thin. There's a few enjoyable throw backs, but it doesn't make up for the absolutely terrible story. As for Megan Fox, I didn't really notice her because I couldn't get over the weak plot. The CGI is decent, except for Shedder who is mediocre at best. The humor is a weird mix of humor too mature for kids but not mature enough for adults. Actually that is essentially the problem with this movie. It's PG-13 rating (primarily for the humor and partially for the action) puts it in a weird position. TMNT has always been an amazing series for the 7-12 age range. Michael Bay attempted to make a movie for the adult fans of the series. However, it never became dark enough to hold the attention of anyone over the age of 12. Maybe download it or rent it off Redbox, if you want a 'trip down memory lane'. But honestly, I still would just rather watch the 90s cartoon series.