One word of caution on the CG-Locks... they work great, but their weight makes them want to wander into the door area without being reeled up. Easy to accidentally ding the door by closing one in the door somewhere. Train yourself now to always check before closing the door. And keep track of pesky passengers who won't be so careful (driving instructors tend to know the issue and usually won't make such a mistake, but other passengers...). I keep my passenger one latched most of the time.
They also work nicely for belting cargo firmly into the passenger seat. Say an overnight bag or a large bottle of water.
2002 M roadster