We stayed at Mercedes' apartment in September 2014 for 2 nights. The location is just unbeatable if you want to be in the old town area of Barcelona. After the 2 days we realized though that staying a bit further out of the touristy center would have given us a more authentic experience but it really depends on what you are looking for and this is obviously not Mercedes' fault. If you want to be close to La Rambla, her apartment is perfect! The apartment as such feels a bit old but at the same time has a certain charm. The rooms are quite small so don't expect too much. We didn't sleep too well because of the rather bad mattress and the aircon being so loud that we had to buy earplugs for the second night. Mercedes' was very kind though, gave us water, offered breakfast and seemed quite approachable. Overall, if you are looking for a cheap place right in the center of old town Barcelona, this might be perfect for you. If you want a good night's sleep and a bit more comfort, you'd have to pay a few more Euros and look for other options. It all depends on your personal preference!