I agree with you on most points except the violence and crime. I think the level violence and crime in Costa Rica is unbelievably high. I have people constantly coming to me with stories about how they were robbed at knifepoint, gunpoint, assalted, cell phones ripped out of their hands, car windows smashed, houses broken into, etc. This isn't normal. There is a reason why you can't leave your car anywhere unguarded and people have to live in houses that resemble bird-cages with the gates to keep people out. Overwelming violence is frequently used and often very small amounts of money or valuables are involved. Every one is a potential target, locals as well as foreigners. They especially prey on pedestrians, people hailing cabs and waiting at bus stops. If you drive that improves your odds significantly against being assalted. Staying away from bars late at night (especially Pueblo) also improves your odds.
I'll take a pass on the "colegios" too, unless we're talking about "Country Days." Or is it "Country Daze"?
The main reason I posted those was for comic relief. Those guys said some pretty humourous takes on some aspects of life here, although I don't think comedy was their intention.