Rui is a very helpful and friendly host! The studio apartment is amazing, very clean and cosy with a nice terrace. The location is good, only a few steps from the metro so easy to get to Trindade, Sao Bento and the Bridge. We couldn't find any supermarkets nearby but there are plenty cafés and it's just a 15 minute walk downhill to the markets.
There is a launderette just opposite which is handy.
Unfortunately there were builders drilling next door so we didn't get much rest, but we were out and about most of the day anyway (and the builders don't seem to work on weekends:)
Would recommend this place!