This is a Chinese joint that's half strip-mall take-out and half authentic-because-you're-the-only-non-Chinese-person-in-it. You know, that type.
I went because it has an extensive selection of vegan mockmeat dishes, albeit dishes that are Americanized Chinese standards (General Tso's, Kung Pao, etc.).
I got a "vege chicken with pine nuts" ($11) and a "vege beef with broccoli" ($10). The chicken dish was just basically kung pao with pine nuts instead of peanuts. The "chicken" was more like really dense tofu, cubed and kind of spongy/chewy (not bad all though). This dish had no spice and was passable only once I doused it with red pepper flakes.
The beef dish was really basic and also not terribly flavorful. The beef they use looks more like chicken (it's one of those switch-hitter mockmeats) and is old-school and simple, but does the job (don't expect Gardein vegan strips).
Da Sichuan doesn't offer brown rice, which is a shame.
The service was friendly and fast, though. Portion sizes are good.
If you're vegan, Da Sichuan might be good for take-out, but don't expect anything spectacular. Garden Fresh in Palo Alto is better if you're looking for vegan Chinese food.