The breakfast at Rainbow is nice and at a good price. I had the Desayuno Chapin which has two eggs scrambled or friend, black beans (that are delicious) fried plantains and tortillas. Comes with delicious Guatemalan coffee and fresh OJ. The prices are pretty good too.
Lunch is alright but not as good as the breakfast.
The service is super friendly and the atmosphere is lovely as the seating is in an open courtyard/garden.
Cons: Lunch is a bit overpriced, Lunch portions can be small