I love La Cubana. It's everything Roncesvalles needed: delicious food at a reasonable price with friendly servers.
Had I written this review back when the restaurant first opened, this would definitely be a 5 star rating. However, now that the restaurant has gotten really popular, the busyness has made it less enjoyable. It's hard to get a table at any time of day and the servers are noticeably stressed out, particularly during brunch. Being allergic to eggs, I had the audacity to ask the server a few questions about whether it would be worth it to order certain dishes egg-free or if I should just choose something else. She was visibly annoyed by my questions and gave very little information. I asked for more time to make a decision, which aggravated her further and caused some big sighs and impatient glares, so I just ordered the first thing I could see on the menu which well, you can guess, wasn't that great egg-free. Not the end of the world but not exactly pleasant.
For the most part though, La Cubana is a great place. I've been close to 5 times and always enjoyed the food and drinks. Hopefully they make a bit more effort in their customer service, it really makes all the difference.