Had a meal here one evening whilst visiting the city. Managed to get a table for 2 by turning up early (restaurant opens at 7pm). Just around the corner from Sant Antoni Metro and the Jazz Si club (the reason we chose this restaurant, as we were planning to go to the Jazz Si afterwards). Beautiful setting, staff fluent in English and very helpful. Fantastic food at a reasonable price, total cost for the meal was approximately €65 for two for a 3-course meal with drinks, plus an amuse-bouche and digestivo supplied for free. If you fancy a romantic and sophisticated meal at a reasonable price while visiting Barcelona, Cera 23 is an excellent choice.