I've been to close to a couple of dozen Pho spots over the years, in several different states (though, many in the valley). Pho Gia Dinh is by far my favorite. Extremely friendly and welcoming environment. It's very casual and has that great small family owned vibe. The food is amazing. I've brought family members, friends and co-workers here and everyone has been glad I did. I highly recommend the Bun Bo Hue, the Ban Cahn Gio Heo, and the Pho Filet Mignon. This place is honestly one of my top three favorite places I've ever been to eat a quick lunch.