DS3 is in daycare and he LOVES his teacher. I have seen kids cry when having to leave but not the other way around past the first day or so. There isn't much in the way of academics. The worksheets I have seen are a little different than expected but probably relate back to his teacher's psychology background. It seems like she is using a social skills workbook. There are worksheets with a picture of a situation involving a few people and then choices of how they might react. I think these are worked on as a group with lots of acting on her part.
They learn songs with hand motions and dance moves, tend a garden and harvest their own snack, care for a class pet, take naps and play.

At that age DS6 was in a more rigid academic setting and hated it. It took him a while to get over the "school is a bad place" mentality.