We stayed on the top (4th) floor, and had a wonderful view! Weather was perfect at the end of April, but we did end up using the AC, which worked great. You will be walking up a lot of steps to get up to the 4th floor.
Comfy bed, clean, our room and bathroom were pretty small but we did not mind. It was the perfect area in Chiado, walking distance to everything - shops, restaurants, town squares, etc. Would stay here again!