Good quality carrier. Although not sure if the concept makes sense, because when you tilt to pull the carrier, the bottom stays flat for the pet, but the walls tilt anyways, so it will get in the pet's face. As for the wheels, they are very small and thin, I doubt in their longevity. I worry each time I go over a rock or hole in the sidewalk, the carrier shakes a lot, not sure the pet is too comfortable inside. Think it might need some larger rubber wheels that could better absorb the shock. But used it on public transit as a backpack without issues.