Just went for my first time tonight and really enjoyed it. Sat at the bar and made my way through a good chunk of the small plates menu (although I didn't try any of the entrees or flatbreads, which looked great coming out of the wood oven). I thought the albondigas and the pork belly bocadillos were the real stand-outs. Very cool space with a nice outdoor patio in back. Great Spanish wine list as well.
They've definitely California-ized some Spanish classics (the sardine dish includes avocado, which was unorthodox yet delicious) but the flavors all work very well and I would recommend it for sure.
This place is great, they have a fun wine list too featuring Catalan, Spanish and Portuguese wines. It's worth noting that they don't take reservations unless you are a party of 6 or more. It's not a huge space, so you'll have a little wait if you get there during peak hours. But it's well worth the wait.
1320 Castro St, San Francisco, CA 94114