Four of us went to Little Fockers and all four of us enjoyed it. I have heard some mixed reviews, but we found it to have some really funny scenes that made us laugh out loud.
I have read a few reviews that say that Meet the Parents was the best, (and it was very good), but it was a brand new concept at the time and very unexpected. I believe this one was equally as enjoyable as the other two.
If you go, plan to relax and have a good time. The world is full of stress, why not enjoy a little levity.