My husband and two teenage sons stayed two nights here one holiday weekend in order to visit Stanford University. The Zen Hotel was reasonably priced & very conveniently located for exploring the campus and the town. The front desk staff were friendly & helpful with suggestions & directions. The hotel was very quiet -- we could occasionally hear other guests coming and going in their cars, but otherwise no noise.
The room was a little crowded for four people, but we managed okay. If I stayed here again with my kids, I'd probably get two adjoining rooms & just splurge for some extra space. I'm not crazy about the design choice to put the sink out in the main room and have only the toilet & bathtub behind closed doors. It's handy if you have one person taking a shower, say, and another person brushing their teeth. But where it's not so great is the middle of the night (or in the morning when teenagers are trying to sleep in) -- there's no way to quietly use the bathroom then wash your hands if the sink is right off the main room with no partition.
This was a relatively minor complaint, however. The room was otherwise very comfortable. They do this strange thing with their pillows, where they sort of fold them in on themselves so they're more like squares than the traditional rectangles, but then you try to use them & you realize they're just regular pillows they've "origami-ed" into squares. (Maybe it's supposed to look more Japanese? I don't know -- I'm Japanese-American & have spent a lot of time in Japan & this doesn't strike me as particularly Japanese.) Whatever. The beds are very attractively appointed. In fact, everything in the room looks quite tasteful, as does the exterior.
Breakfast is served in the main lobby, which is a simple but comfortable space. The breakfast options were also simple but perfectly adequate: yogurt, cereal, toast, bagels, eggs, some kind of breakfast meat (sausages or bacon), oatmeal, fruit, coffee, juice. Also some kind of chocolate-marble muffins that my boys just LOVED. They provide a few different papers to read & CNN was on the TV most mornings, audible but not overwhelmingly loud.
All in all, a very pleasant stay. If either of my kids gets into Stanford, I could see spending the night here again!