I was hesitant about taking this train, because it is so expensive. However, they do have a student rate, so if you are a student or senior citizen (and perhaps young child--I don´t know since I don´t have children) you will get a half price discount. It´s still much cheaper to take the city bus but the train is more comfortable. I rode the bus from Ouro Preto to Mariana and had to stand up most of the way and it was very crowded. The bus took 45 minutes from Praça Tirandentes to Mariana. The train is only 15 minutes more and on the way back I had a seat on the train and it was not at all crowded. It was much more relaxing than hanging on a pole and sweating and keeping an eye on my bag, which would have been the case on the bus. I planned to take the bus back but when I got to the stop and saw about 50 people waiting I changed my mind. The train station in Mariana has a library, a playground and also a video exhibit in one of the old cars. I only got to see two of the videos (they are 10 minutes each). The most interesting ones I didn´t get to see--about the people of the historic towns, baroque art/architecture and metalurgy. That car has a/c so itś a good option while you are waiting for the train. The train ride itself is not so spectacular. It would be better if there were a guide to tell you some history. There is a waterful and you get to see the dried out river and some horses and local houses. Itś worth it if you get half price, don´t mind spending the money, or just would prefer a more relaxing ride than the bus.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.