There are two places called Best Szechuan in the San Gabriel Valley, and the question naturally arises of which one is right. The older one is on Valley Blvd between Del Mar and San Gabriel, and the newer, fancier one is on Garfield near Yunnan Village and Chung King. I like the old one and have always been disappointed at the new one. My favorite thing at the old one is an appetizer called something like "chopped chicken in chili oil". There's a lot of meat, and along with the pool of flavorful chili oil it's crusted with something like ground sesame. It's just great, and if you eat it with rice it's a meal by itself. The rest of the menu is divided between items with and without the chili symbol. For example there's the "fish fillets in Szechuan style" or something like that, in which a layer of fish swimming in a chili oil based sauce sits atop a layer of greens swimming in the same sauce. The only drawback, common to most of these authentic Szechuan places, is that some of the dishes are so soaked in oil that you're paying a price for your authenticity.