Of course, you could call it bad luck, but when I arrived in 7:30pm from a 20-hour journey, there was no water in the hotel (until 6:10am the next morning) and 30 minutes later the hotel was left without internet too - until next evening. Unbelievably bad experience in that sense... Adding the unbelievably noisy air conditioner and the fact you could here all sounds from the connected room (you can guess what they were, even though I wonder how could one engage in s*x in a hot summer night when you don't even have water), you could call this a nightmare - but in the end I don't remember it like this 2-3 weeks later...
And that's because this place is unique. Located in a late 18th century house, built on a very steep slope, you enter Casa Amarelo through a long corridor dug in the rock, from where you enter an early 20th century Swiss elevator, which takes you to the reception floor. From there you have access to the rooms, which are located on several levels accessible by outdoor stairs. The view to downtown Rio is great (no view to Christ the Redeemer statue, though) and the neighbourhood is old, quiet and charming - and also safe.
I am not sure if I want to stay in this exact hotel again due to the level of comfort, but I definitely don't regret being there once, because it's an experience you can't have in a normal hotel. Would definitely recommend it for a short stay, but for more than 2 nights - no.