Me and my girlfriend stayed for two nights in the apartment and everything was as we expected: all clean, refurbished and quite comfortable for a couple ( the bed was a little bit squicky and the pillows were hard but this is my opinion ),the self check-in and out was usefull for us because of the time of the arrival.
The only thing is the position of the apartment: if you want to visit the city without busses and metro ( it will save you money ), you have to walk a lot to visit the main attractions of the city, for the ciudad de les arts i les ciencias you need 50 mins walking to go and to come back at the apartment. Beside that the apartment was good and Maria answered quickly.