My boyfriend and I spent a weekend in the Casetta Loka and we really enjoyed it!! The apartment is amazing, styled with love until the last detail and with all the comfort you might need.
The position is also good, close enough to San Lorenzo (very nice area to go out) and to the central station (2 stops by tube or 10-15 min walk).
In case of need, Roberta was already available for us.
I definitively recommend Roberta's place and I would/will stay there again soon. :)