LO has been in a Montessori program since she was 18 months, and she will be 3 on Friday. We've been happy with the school thus far. She is about to change rooms and go to the primary class which has ages 3-6, so that will be a new challenge for her.
She used to attend a traditional daycare from ages 3 months - 18 months, but the management of the daycare started to have some serious issues so we moved her.