I have two kids in Montessori right now and I think Dude pretty much summed it up. This is our second year with Montessori - my DD4 is a second year Children's House and is doing very well. My DS7 is a first year lower elementary and I have posted about the issues he has been having. My son is on the higher end of the gifted spectrum and I think is struggling with many issues that have been discussed here (over excitabilities, low processing speed) in addition to perhaps the environment not being ideal for him.
I would characterize my DD4 as being very bright, perhaps even moderately gifted as the skills she has learned in Children's house exceed what a public school Kindergartener would learn. I think the Montessori method works for her.
We have had a good experience with our school - they are strictly Montessori but have been willing to work with our son to modify some of the lessons. I think it really depends on the teachers and school.
