I am less enamoured of 50/50. I have worked with children in lots of capacities in my lifetime and they tend to confide in me. I have to tell you that universally the kids in 50/50 situations who confided in me, really hated it, but never wanted their parents to know, because they didn't want to hurt either parent's feelings. They hated the changes in routines, changes in rules, changes in "stuff" between households. The ones who had siblings in both homes often expressed feelings of being a visitor in both homes, because their siblings didn't have to switch.
Some children of course had a preference for one parent over another, for all kinds of different reasons. Others didn't have a preference but still wanted just one "home".
My ex and I worked things so our daughter saw both of us nearly every day, (Sunday was about the only day he didn't see her) but she lived at my house and overnights at her dad's were special occasion/slumber party sort of things. It suited both of our lifestyles. Many times I overheard her friends expressing envy that her mom and dad got along so well and that she didn't have to "switch" all the time.
I knew one family that I considered to be the "poster children" for making it work. They lived in the same subdivision and allowed the children to freely move between both homes, but each had nights where the children slept at their homes. The children got to hang out with the same friends, do the same activities, ride the same bus back and forth to school, but both children, in their teenage years, rebelled against 50/50 and wanted to live with just one parent.
Like I said before, I don't think that any of us would want to change homes every other week...why would we think that our children would feel any differently?