The place is quirky and cute. It was clean and well taken care of. The location is perfect, right in the heart of the best neighborhood (Alfama) with so much to see and do; also close to the water front and train. We had a baby and managed to walk everywhere even with the stroller. Although there are a lot of stairs you just have to pick your route carefully.
The bed is quite hard but not uncomfortable. It is noisy on the street for a lot of the night (people in the bars, fado singers, garbage trucks at night, bottles being recycled), so bring ear plugs. The noise can be nice though, reminds you you are in the heart of it!
The host is friendly and easy to get ahold of, we had a few questions during our stay and she always replied right away.