Surprisingly, it's still quite liveable for adults. Despite the sloping roofline, the #3's wheelbase is actually 35mm longer than the #1, freeing up more legroom . Headroom is naturally a bit tighter for tall passengers (over 180cm), but it's fine for average-sized adults on shorter trips. The trade-off for the sporty look is a slight compromise in rear headroom, but not a deal-breaker . For buyers considering the smart #3, that matters because it affects how easy the car is to live with, whether for commuting, family use, long-distance driving or ownership costs. The useful way to read this is not as an isolated specification, but as a clue to how the car will feel in real daily use.