The house is in the middle of Valletta and perfect for sightseeing in the city or anywhere else in Malta (central bus station nearby). Daniel is so nice and answers immediately.
The room was sparkling clean and like on the pictures. Just the balcony is extremely small but the roof terrace is only 1 floor above so this doesn't really matter.
I can very recommend this place for 1-2 persons :) You should not have an issue with stairs though.