La Loca is the best spot to have tapas in Bonn. It is easily accessible from the city center and…read morecentrally located in Poppelsdorf. Even though it is a small restaurant (with a lovely outdoor sitting area), you never feel packed inside even when the place is full. The decoration is simple and nice. The staff is always attentive, friendly and fast. Plus, almost every staff member speaks English. I overheard that some even speak Spanish, or try to speak the language at least. :)
In terms of food, only a few of the tapas selections are mediocre (like pollo al ajillo and muslitos del mar). I am not a big fan of La Loca's mixed platters, either. Yet, the rest, especially some meat products like meatballs in tomato sauce or honey-glazed chorizo or vegetarian options like espinacas gratinadas, are really of high quality. The quality is very consistent, too; the taste and quality of the food has always been high for the past two years since I first visited La Loca. They also serve other meat and fish products and paella but I have never tasted them so far.
The prices are reasonable, too. I cannot say the food and drinks are cheap, but they are not expensive either, considering the quality of the food and service you get in a very central location.
Overall, as I pointed earlier, La Loca is the best spot to have tapas in Bonn. I am sure you will not regret to visit, especially if you are sick and tired of burned, overcooked, oversalted or artificial stuff served in the name of tapas in many other place in Bonn.