See also:

Infants
Infants up to at least 1 year old should be placed in a rear-facing child restraint. NISSAN recommends that infants be placed in child restraints that comply with Federal Motor Vehicle Safety ...

Precautions on child restraints
Precautions on child restraints WARNING: - Failure to follow the warnings and instructions for proper use and installation of child restraints could result in serious injury or death of a ...

Boxy Dynamics
I have no reason to believe the Cube is unstable, and it has a standard electronic stability system, but it does feel more top-heavy than the other boxes — and definitely more so than convention ...