I used to think the Ninja Turtles were alright when i was a kid but they were never the biggest hit with me (i preferred the transformers hehe) but it was really cool that the Turtles have survived long enough for me to take my little boy out to it and it still hold relevence for kids these days.
This movie won't change your life. Its pretty cool for what it is, a break from reality for a couple of hours and some great action shots and and quite enjoyable action scenes and even a little humour thrown in. Its a good time and a plot is simple enough to allow kids, especially boys(whom its aimed at) to dig it but enough humour and action to keep the parents entertained too.
The graphics and visuals in this are awesome. It is directed by Michael Bay (of transformers fame) and has a similar style feel and humour to those movies. I'd say if you liked the Transformers movies you'd like this. The similarities between this and the Transformers don't end there either.. This movie of course features ultra babe, Megan Fox in pretty much the same role she played in Transformers. Me thinks she was deliberatly placed to keep the big kids interested on the movie but hopefully wont have the other effect of having your young kids asking "Where did I come from Daddy?" The Main villain in the Story is of course Shredder who looks and moves suspiciously like Megatron of Transformers fame.
Either way don't analyse this film too closely just sit back and and Enjoy the action!