This place seems to get mixed reviews. On my visit, I had a good experience. The plates were all reasonably sized, food was fresh & delicious with good ingredients & great execution on the cooking, service being friendly and prompt.
My recommendations would be the Setas al Agillo (mushrooms), braised ox cheeks with mash, paella, and for dessert, tarte de santiago and the caramel flan. Good cosy atmosphere.