This place really doesn't need any more business - the parking lot is already overflowing - but this is too good not to share.
Falafel Stop in Sunnyvale is the first Silicon Valley place I've found that makes a great Israeli-style falafel sandwich. This is falafel with chickpeas only, no fava beans, with cumin as the predominant seasoning. Falafel Stop's are a bit less cumin-y than others I've had in this style, but that's no problem - they're still really good. The pita is the best I've had in the area, freshly baked at the shop and doughier than usual (though not as doughy as the ones at Oren's Hummus Shop). The vegetables (fresh and pickled), tahini, and hot sauce compliment everything perfectly so there's a great blend of flavors; nothing sticking out and overwhelming the other ingredients.
It's a limited all-vegetarian menu that also includes hummus, sabich, masabacha, and chopped salad. I'll be trying the masabacha (hummus with chick peas) next and see how that compares to Oren's. I really like Oren's hummus but not their micro-falafel.
They're on Sunnyvale-Saratoga Road just south of Fremont. There's more information at http://www.falafelstop.us.