This restaurant is one of my favourites in Lisbon!
I've only been there at lunch time, which means I have only tried the buffet ( during the week). I've heard/ read that at dinner time things are not that good, or at least, people aren't lucky with the meals they choose from the menu and it is more expensive.
I can say that the buffet is amazing and I've loved it every time I went there. It has several vegan options, warm ( if you go early) and really tasty dishes, as well as amazing salads.
At lunch time it is also cheaper, so if you are looking for a calm, cozy and peaceful place to experiment vegetarian/ vegans meals, you won't be disappointed!
Cons: Expensive at dinner time, No buffet at the weekend