For those of you who have Kindergartners, how has the transition to K been for your child?

DS1 has been going to daycare/school his whole life, so he is definitely accustomed to the routine, but I'll still be a little worried about his transition. He currently goes 5 days to a Montessori Jr. K and I'm hoping that the 5 day schedule this year helps him with the transition to public school in the fall.