dumb nectarine tree when we moved to our house in El Cerrito about four years ago. It sits in a weird spot, off-center in the backyard. It did nothing our first year; my husband pruned it the second year; we got a week's crop last year (which allowed us to finally identify what it even was); and now we are at the beginning of what will obviously be an extensive crop.
The fruits are edible, but small and not particularly good-looking. If you don't get out there are harvest daily they drop to the ground overnight and delight the raccoons, who barely need an excuse to party in our backyard anyway. WHY couldn't the previous owners have planted apple, pear, plum, or some sort of normal citrus tree instead? I guess it could be worse. Could be loquat. Zing!