IMO it's good, even if part-time. Your child can meet future class mates to make the to "big school" transition easier. Pre-school has a schedule... which also eases the transition to big school. My ds LOVES his preschool he has really become a leader and learns something every day. It has provided him oppertunity to go to swim lessons and gymnastics classes weeekly that we would not have time to do w/ him. He is making life long friends for sure.