La Paella is the best Spanish food outside of Madrid! As someone who is very connected to her Spanish roots I can spot a fake from a mile away. Eating at La Paella was like sitting in Plaza Mayor - the ingredients in the food are imported directly from Spain, even the broth to make the delicious paella is imported so it doesn't get more authentic than that! The decor is subtle, leaving the overdone bullfighting pictures out and reminiscent of a true tapas bar and the staff...well Angel, Paco and the rest of team have so much passion for the food you can taste it!
If you are looking for a truly authentic Spanish (not hispanic) restaurant then do yourself a favour and run, don't walk, to La Paella!