We (my sister and I) stayed with Monica for 5 nights and had a very pleasant stay. Monica was very sweet and can speak English very good, we have had some nice conversations! The appartment was very nice and it is located in a GREAT area!! You have to walk 3 levels up to reach the appartment, which was no problem for us as it felt good after eating lots of tapas ;).
It sometimes could be a bit warm in the bedroom but if you leave the window and door open you have a good breeze in the room. I would definitely recommend people staying here as it has good location, a nice appartment and very very friendly host.