Just finished watching it. I thought it was freaking awesome!
Make fun of the US? There were some jokes at the expense of the US but I would hardly call it making fun of the US.
There were a lot of subtle jokes in there. Like when we first see Vivian Wagner when she is flipping through the screens there are hints of Wagner's Flight of the Valkyries playing, there was actually a few scenes where they used parts of his work. Also in that same scene they re-enacted the famous seen from Downfall. I feel like the uniform she was wearing when she was commanding the ship was supposed to be a reference to something but I don't know what.
I thought this movie was really well done. I was actually expecting some really horrible movie based on what I have read here but was extremely surprised by how good it was.