I don't like them, but I think it's because of how they are done. First of all they happens very seldom - so every time it's something "new" that make me nervous. Second, I feel that I, as a person, am being criticized by adopting this or that way/technique/etc... Third, there's never a precise and specific topic that is analysed. Maybe if I knew that during a month, the teachers would be visited so some specific problem WE face in our classes (and the different solution each eacher got to) could be noted for further discussion - this would put we (teacher) and the observers on the same side. And forth, I would like to have many opportunities to observe other one's lessons - including the observers' lessons