I considered Montessori for my ds5.5 when he was 4. They have some very cool stuff and the exercises do show what they are trying to show BUT if you only ever do the pink tower they right way how to you find out that a top heavy tower falls over.
In the end my decision was based on the fact that the system was not flexible enough to fit with my work and my desire for my child to keep doing our Monday activities (I only worked four days) and although with our funding system makes it affordable for SAHM as a working mother I couldn't afford to pay for childcare I didn't need.
