The Koppies are footnoted by everyone as a nice place to walk, "but not on your own of course". Well, I was on my own and not failing very unsafe, so I ventured up the path anyway. My possible fears were also assuaged by a security guard down the hill.
Speaking of security guards, while Mellville looks pleasant enough (and on saturday morning there was barely anyone on the street to make me feel less than safe), just about all the houses are behind gates and fences, and you regularly see security guards, especially in the evening.
But the streets as such as charming, with some beautiful flowers.