Gat rossio hotel is a wonderful place to stay at.
We (me and my boyfriend) stayed for 3 nights at beginning of September. Our room was small and cozy. Everything was well organized, sheets & bathroom - clean. We had bathtowels, showergel & eveb a body lotion. The breakfast (it is an extra - 9 € per person) was served at a shared table, and it had various options.
The only thing we didn't like, was the noise from both other hotel guests, and from the street (as our room was looking at the street & restaurants down there). If you have light sleep and you are searching for a place to get relaxed - perhaps this is not your place. Otherwise - this is a really nice hotel, with friendly staff, good food, and everything needed for a short stay in Lisbon.