I am doing before/after, and I absolutely hate it. I really do. The kids aren't meshing with my kids, and I am more set up for babies and toddlers.

It might just be me, but I love love love little ones, not so much the bigger ones. Manners, respect and such is a huge thing for us in our family, and having walking talking children being rude to me pushes all of my buttons.

I also find that on PA days and holidays and such, the big kids get bored and cranky during nap time.

So in summary, B/A is not for me. It might be for you, though.