Belem's place is a good place to stop in Lisbon for a few nights. Essentially it is a shared apartment with a couple of bathrooms, kitchen, Balcony area and a small TV room - everyone has their own rooms which are lockable. The room was clean and well appointed. For me it was a good place to rest my head for 5 nights over the Eurovision period and wasn't too expensive given the time of year. The location is fairly good but be aware the nearest metro station is currently under construction so it's a bit of a further walk (but not too much). Belem was very helpful and always responsive - she helped me check-in and gave me some good local tips. She lives above the apartment so is easily contactable.
I would certainly come back to Belem's place if I needed a place to rest my head for a few nights in Lisbon again.