There's a Del Taco 12 miles away in the next town. I will go there if I'm in the area running errands. No indoor seating during covid; it's hit or miss now due to "staffing issues".
I go there for tostadas, value tacos and crinkle fries. I have never had a burger there, although I always threaten to get one but chicken out at the counter.
When I was working in San Jose, I'd drive 30 minutes into Campbell to have lunch there. One day, they told me they have no taco meat. WHAT?? Next visit, they were closed.
Yes, better than Taco Bell. Again, it's not saying much but people in Manteca are just more pleasant than normal. The bay area folks moving in are changing this, though.