Montessori School - preschool ?'s

papagena

We're in the fun period of trying to figure out what we want to do for DS and preschool.  We're interested in learning more about Montessori and have a lot of research to still do but thought I'd stop by here and get opinions and experiences. 

I was curious what the big differences are at the Preschool age between Montessori and regular preschool.  Also, for those of you considering/going to a Montessori preschool, how far are you thinking of taking it?  Preschool only?  Elementary?  As far as you can?  Anyone know a child who has been through grade school or farther and had to make the transition to higher learning in a public school or university?  That's one of our concerns (although obviously we have a bit before we'd be deciding anything about elementary or middle school, so I'm probably jumping the gun there).

Like I said, we still have a lot of research to do (I'm actually looking at one of the Michael Olaf site at the moment), but I thought this might be a good place to jump in and get thinking about it more.  Thanks!