Great burgers, definitely one of Poway's best..
The Hamburger Factory is located in Old Poway Park. It's always bustling, and you can see why-- the location and decor are charming, the staff is friendly, and the food is filling and delicious. The hefty burgers are top-notch, of course, but I also recommend the BBQ chicken wings, onion rings, and brisket.
Only drawbacks are that it's a bit pricey, and-- as I said before-- always crowded, although your wait is typically no longer than you'd experience at a comparable sit-down restaurant like Outback Steakhouse. Five stars, not to be missed.