I worked at LaPetite in OKC as the assistant director. I enjoyed a lot of the curriculum and how things were available.
I also think that one day a week isn't much and for a 2 yr. old that may be more traumatic than fun for her. She may need to go more to just darn right get used to it faster. But you can certainly see how well she adjusts.
I don't care for Montessori style of child care at all. I think it is thinly veiled chaos at best. If you have one child who wants to go play with the drums and loud toys and you are trying to have circle time it is silly to allow that one child to interfere with everyone else and give them the idea they want to go play too.
I had one kindergartner who refused to do journal time, he would not come to the table with his notebook and do the work. He would argue and fuss the whole time.
I am of the school that kids need structure, not being structured to death though. But having some rules is important, like if it is time to be in the circle you need to be there and participating. If it's time to go play then have some free time and enjoy the different centers but make darn sure you put the toys up that you had out first.
I think that kids learn a lot by playing, they just need to have a better system in LaPetitie for that to happen so everyone can be together and learn together, and everyone can go home feeling like they had a productive fun day.