This came folded in an easy storage tote with handles. It doesn't take up much space when not in use.It unfolded easily and came with a simple diagram of how to install. My Bernedoodle is 60lbs and he didn't seem to even realize this was a seat extender and not the actual seat because it was so sturdy. We only went for a short ride but it seems like this will work great for keeping him in the back on long car rides. We were still able to put bags under it as well.