It's a poor guide book which doesn't mention this place (go for the tiny taberna on c/Victoria, rather than the larger, more restaurant style versions on c/ Nunez de Arce and c/Goya).
However, I'm not sure any of them mention that if you order a 'racion' of langostinos a la plancha rather than the road-more-trodden gambas a la plancha, you get twice as many for just 20 cents more. Tastes just as good to me. Upon leaving, I've always been given a voucher for a free 'chato' of the delicious sticky house wine at one of their other restaurants. Ask if they don't volunteer it.
12, c/ Victoria, metro Sol
Send your feedback or queries to firstname.lastname@example.org