Anyone had any experience of Montessori at secondary level?

[floppops]

I am starting my DD at a Montessori nursery and plan on having her stay on to primary.
I am wondering - although it is far off whether secondary Montessori would be good for her? I'm wondering whether the transition from a montessori primary to a "normal" secondary would be difficult.
I've read about a senior school in Oxfordshire that looks wonderful.
Does anyone have any experiences of secondary Montessori education?

aren't they secondary schools called Rudolph Steiners?

Steiner is a different teaching method I thought