Traditionally we stick to class hotel rooms when traveling with our three kids, but as they've grown to teenagers we decided to try something new. The two levels and plenty of sleeping space allowed literally everyone to not only have their own bed, but their own space for watching tv and goofing off. Every room/level has its own thermostat, too, which was a real treat!
Although there's enough space for everybody to seek out their own quiet corner, the communal area around the fireplace / kitchen table is small and cozy, so you really do get the best of both worlds, whether you all want to be together or just need your space.