The value is only real if your estate reaches a ramp without crossing a jammed junction. Check the actual route from gate to on-ramp at the hour you will drive it, not on a Sunday viewing.
For this audience the single most important specification is secure parking. Street parking has effectively disappeared from Kilimani, Westlands and Parklands, and Nairobi County charges for on-street bays where they exist. A dedicated, controlled bay is therefore both a security question and a daily-logistics one — most vehicle-related incidents tenants report happen in uncontrolled parking, not on the road.