Stonestown isn't in the Outer Sunset, its closer to "Lakeside" TBH. It'd probably be a good spot for housing since the lightrail runs next to it, its near a college (SF State), and near 280 which makes commuting to the southbay easy.
I honestly don't recall what it was called before the Mall existed, then again it was built in the 50's and tons of new neighborhood names showed up then...
Its a stones throw from Daly City so indeed about as far as you can get from downtown heheh.