Different trucks are good for different things...
If I want a torta, I go to the one on Springs.
If I want a burrito, I got to Jalisco's. (restaurant is better than the truck, IMO)
If I want some bomb ass nachos, I got to the one on Broadway near Maher's Market.
My old roommate got one of the 2 foot long burritos from the spot by the mexican pool hall, and it had a fuckin CLAW in it. I saw it with my own eyes. It was a 'steak' burrito, but I never saw a cow have claws.......gross!!
And I can't stand the one by the old yardbirds...their steak tastes like pot roast.
The best truck in town though is right across the Mare Island Bridge, on mare island, but they are kind of expensive. I eat there for lunch a lot!