Yes there can be funny and decent comedies coming from Greece. Even if some jokes work more, if you have a knowledge of some of the Greek history and/or background (incl. Relationships to other countries), but it still is funny.
Having said all that, that doesn't mean, that the movie has no faults. Quite the opposite. It still has a few too many awkward moments, some jokes that misfire entirely or won't even ignite at all. The premise of course is bound to bring many jokes with it. Compared to other recent Greek comedies/efforts, it does almost exploit every possible good joke there is. It's in those details, that the movie fails to deliver something truly great and the fact, that it's more for southern Europeans, who are more likely to get most/all the jokes. I just hope they continue like this and continue making good movies. On a (small) different note, a musician plays one major role and the movie is filled with (greek) Hip Hop music!