While unreliable, Adelmo is welcoming and has clearly put a lot of thought and effort into the place. The location is good.
The studio has only one major flaw - the windows and door do not isolate at all. One window had a taped hole in it, while elsewhere the gap around window frames was sufficiently big to see through.
My general advice is to avoid Rio as best you can, but if you really have to go there, Adelmo’s place is a very good option, given the standards of the market. It was a relief to leave after 1 month.