I've been to zen several times, usually with a large party, and the service is always wonderful. The food is mediocre to good, though the highlight of the meal is always their amazing tres leches cake. They've infused Sole's (RIP) Spanish menu with the Asian offerings, which gives diners a large, if odd, array of dishes to choose from. I love the Zarzuela de Mariscos - a seafood melange stewed in a tasty tomato sauce with saffron rice on the side.
Trendy but warm atmosphere. Servers are always helpful and attentive. Parking is kind of a pain on busy nights.