La Bella Managua reminds of two things; all there is to love about Nicaraguan cuisine and how great a simple, local restaurant can be when they focus on the fundamental elements of quality ingredients, careful preparation, and genuinely friendly service.
Everyone who has ever had whatever the fish of the day is has raved about it (including me). The ceviche is also universally excellent and well-priced considering the amount of fresh quality seafood. Whenever I've forced myself away from the fish of the day, the usual result has been excellent although some of the lower priced entrees have a bit of a "combo platter" feel.
Since absolutely everyone I've sent to or discussed this place has walked right passed it at least twice, they probably need to do a serious re-think of their signage. Definitely worth your time and trouble to look up at the street numbers and come in for a meal. You'll be pleased that you did.