Noe, try to fit a 4x8 sheet of pkywood, or 4 sheets of sheetrock, or a dishwasher or lawnmower or a cardtable or set of chairs or a 48 12 foot steel 1x1 pieces of tubing it. Add a welder, 3 toolboxes, and .....
Nice for simple one-person commuting, but that all.
Actually, one of the great things about the Honda Fit is the ability to have essentially a flat cargo area all the way to the front seats when you fold down the rear seat. It's so roomy that you could probably put a small Toro riding mower back there!