The question to ask is this. If it wasn't filmed over 12 years would anyone like this movie? For some reason people think filming it with the same actors over 12 years makes it groundbreaking.
It's almost like we're being punk'ed by reviewers.
Because it is. Has there been a movie made before that attempted something like this? No, that makes it groundbreaking. When you think about it, it was a massive risk to take by all involved that the actors and director would still be around and interesting in participating after several years. IMO, if you love movies, when something like this happens we should appreciate and celebrate the effort.
I am not a huge fan of the movie itself - this was a strong year for me and I don't think it would make my top 10-15 movies, but to act like what they did what just a slight trick of a camera or something is kinda silly. I am sure people would like the movie regardless - it is a good family drama, but what they did elevated it that much more.