Sound proofing: TERRIBLE - we could here the neighbours. Last 2 days of our stay, there was a group doing party until 5-6am. Could not sleep at all - we would hear them singing, partying, opening and closing the doors... We mentioned it to the administration on the first occurrence, nothing was done from their part. Nothing either was corrected on the second night.
If you are looking for a quiet place, it is definitely NOT the place to be!
Good location: metro station, beach and restaurants nearby
Cleanliness: decent
Check-in: they delivered the place over an hour after the promise time. Instead of apologizing, they said 'it is only an hour and you do not really need the apartment'.