It's almost a shame that Xavier Gens seems to have to resort to making movies like this. On the other hand maybe he actually chose this. Whatever the case this feels like a Spring Break movie for adults. It of course has other things to offer but in its heart or in a nutshell this is it.
Now Budapest may be a party city, Jerusalem is for sure, but one of the reasons they probably chose it, is because it is cheap to shoot there. Eastern Europe is a welcome region for many movies, because you have knowledgeble film people/technicians there, but also do not have to spend too much money making a movie there. Something they used here - including some rumors or prejudices we may have about the city I reckon ... you can have fun with this as with many other movies, but you have to be in the right mind set