I can recommend staying at Alinea's place - she definitely deserves to be called "superhost". The accommodation is perfectly situated - near a metro station and close to but not right in the busy (and loud) area of Alfama - and has everything you need for a short or a long stay. The only downside, for which the host cannot do anything, are the thin walls - when the neighbour was speaking it felt as if they were in the room. You do not necessary need ear plugs but I recommend having some to be on the safe side.