Pros
I really enjoyed my time there. Everything was very organized, and well done. The people there are warm and fun to be around, a lot of internationals so you get to learn a lot about other places. The kids were so fun to be around and I generally loved the days and what we taught them.
Cons
Even if there was a hitch, Lucy (my manager) was so organized that things didn't fall apart. Everyone handled things so well, even on bad days, so I wouldn't really say there were any cons to speak of during my time with eco unesco.