Having visited Wahaca for the third time today, I cannot help but like this place. While I have to agree that the long waits and no booking policy are a real pain, the food is definitely worth it. There's a nice relaxed but buzzy atmosphere to the place and it's a fun place to eat something a little different from the norm in central London. It's only been in the last few years that Latin American food has really taken off and Wahaca's popularity (i.e. queueing most nights) is testament to the fact that it is filling this niche in the market.
All the dishes we tried were fresh and tasty and full of flavour. I used to feel that the menu was somewhat restrictive, offering the same ingredients in a different format but the latest menu offers a much greater variety of both meat and vegetarian plates. The only disappointment were the actual tortillas used for the tacos which were unnecessarily greasy compared to the other dishes. I am inclined to agree with the other review as to the authenticity of some of the options (I certainly never saw a single churro in the weeks I spent in Oaxaca), this is certainly a step in the right direction and is far removed from the tex mex offerings of places like TGI Fridays. If you are new to Mexican cuisine and don't know a chipotle from a cinnamon stick, Wahaca offers a much more cosmopolitan approach to Mexican party food.
Wahaca, 66 Chandos Place, London, WC2N 4HG