This may be Vietnamese restaurant but the owners are a local Spanish/Catalan and a third generation Chinese-Vietnamese born in Spain, third generation restauranteur. I've been to her parents' restaurant 10 years back, hers is a better ambiance, modern and bright (big and clean bathroom I may add). The food is authentic to the extent of what Asian ingredients available in Barcelona. The bún bò Huế needs to be served hotter and more spicy than what was served to me. All dishes were well decorated and nice presentation. The wait staff are not Asian but knowledgeable of the Vietnamese menu, they are very pleasant, eager to please and always come to my table with a smile. The owner herself is a very nice lady who is very hand on in her restaurant, I tried her turmeric and ginger cheesecake and it was absolutely delicious , there was no overwhelming taste of neither ginger nor turmeric; thought it could be a little bit less sweet for my taste.
You get loads of food for very little money. It's a place to go to when you're hungry for some Vietnamese food without going through the trouble preparing it yourself.