As far as the real events, i watched what I was expecting even me not having read Varoufakis's book. So almost nothing special here, no surprise. So, despite the "outsider's" role of Varoufakis, expected some more "insider's" information.
I liked the performance of almost all characters. They are totally in line with the actual person's image to the public, in a dramatic and brutal realistic way together. I would say it is Gavras style with a bit of Nikos Perakis'...
I liked the photography. Lighting and colors are top notch in bright and dark scenes. Especially the darks in Varoufakis' house or the semi-lighted scene when Varoufakis speeks to british bankers. Composition and perspective are also excellent. However, there was some lens distortion in the wide internal shots that could have been avoided. DOPs have managed this decades ago shooting film, so no excuse have them shooting digital nowadays, except it was a choice not a compromise, however i can see no reason for this in those particular shots.
As far as the screenplay and editing. Did not like it very much as a whole. Nice cuts, fluid scenes, but many important events are a bit squeezed at the end. Like the editor suddenly realised that he aproached the movie's time limit and had to exclude takes, or the producers suddenly run out of money. Maybe that is how Varoufakis book ends? Do not know, but it is a movie not a book and I believe great Costas Gabras could have done better here. Final documentary titles also seem to try and fill this gap, with no success in my opinion.