I'm half German, half Croat. Granted, I was just a kid, but I can remember hour long waiting times at the borders. Even today, with only the border Croatia-Slovenia remaining (and, back to Germany, our beloved Interior Minister's Grenzpolizei checking tourists for not carrying refugees), the waiting times can be hours. The earlier we can get rid of this crap, the better.

What is also a benefit of ever more unification across Europe: communication. Family vacations in Croatia meant next to no communication with friends back in Germany as phone calls and SMSes were ludicruously expensive, and mobile internet roaming all but unaffordable. Now? No roaming charges any more.