It is quite disappointing film. It seems that is uses much of footages from the TV series. Fights are cut out and those that remained are very short and not full.
This film clears many things that were confusing in the TV series, but other things were reworked and I don't know what is the truth because I didn't read the manga. So if you watched the Rahxephon TV series this theatrical release will help to understand them better. If you will try to watch this anime without TV series I think it will be uninteresting and very confusing experience.