Gozp:
Sorry to be so late on the pics, but here are a couple that show some of the trees in my yard.
Boxturtle:
I have only personally seen two mature Sharwils in Southern California, one at the South Coast Field Station avocado collection in Irvine and another at a friend's house in La Mesa (San Diego). Both trees do very well: they look good and produce plenty of fruit. I have a tiny Sharwil in my yard in Ramona (San Diego County), but have no idea how well it will produce yet.