S.L.
I had front to back with two of my kids that were 14 months apart and it worked fine but mine had the seats facing so that was not as good as the one my daughter has for her twins which is front to back but both facing the front. They can 'bother' each other some but not nearly as bad as in the side by side one. That is if you have children who 'bother' each other and most do. It goes through doorways and doesn't seem to take as much room passing people in stores, etc.