This is not a great hotel, but it's OK for the price. Keep in mind that some rooms are pretty good, others are not good at all. I stayed in one of the rooms facing the back. The room was big, fairly well kept, good AC, a 32" flat screen TV, a comfortable queen size bed, good bathroom. As usual in Brazil, there is a shower, but no bathtub. The decor is dated, but the room is in good shape and very clean. A friend of mine stayed in one of those dismal rooms facing the side wall and asked to move the next day to a better room. If possible, ask for the room numbers ending in 4, 5 or 6. They face the back, are brightly lit and very quiet.
As for the rest of the hotel, there's not much. The dining room is very small, the food is passable, room service was quick, and the breakfast buffet is a bit below what you'll find in most hotels of this class in Brazil. The location is OK, there are many bars and restaurants within walking distance (just be extra careful at night); there's also a metro station nearby. The staff was very helpful. Overall, my experience at the Mengo Palace Hotel was good. I think the hotel is a bit overpriced, but hey, summer in Rio is like that: all hotels are kind of expensive, and this one was in the mid- to low-price range.
