I ate there many times, and I have nothing to complain for. Compared to the other restaurants in the area, the food is quite good (enough) and the price reasonable (even though you may find cheaper). They change the set menu everyday (3 options for the starters, 3 options for the main course), and the menu also includes a beverage, a dessert and bread, for 11 soles (12 soles on Sunday).
This place is really a good option to get people to discover typical Peruvian food in its vegetarian/vegan option, so I brought family and friends there in order to make them taste classics like the ceviche, the tamal o the carapulcra.
There's usually at least one vegan option, and you can always ask for a vegan one (when possible). The waitresses and the boss are very friendly (well, compare to the usual service in this part of Lima) and the atmosphere is nice for a comedor.
Portions are well served and usually the food is good, although they use a little too much TSP to my opinion. Also, I'm not fond of the bread they serve, and the dessert is often something like the mazamorra morada, which I don't really like.
Cons: Sometimes flavourless