Overall it was a very nice experience staying at the guest house. It have a perfect location, with walking distance to almost everything.
The room was nice and clean, and if you where missing anything the supplies from the host was easily accessed. Furthermore the check in and out was perfect, no problems at all.
Only note I have to give is, that the rooms are very noisy. You can hear everything from downstairs, upstairs, and in the room beside, which for us unfortunately cost a bit of sleep.
But expect that, it have been a pleasure staying in Lisbon.