Sergio's place was as we expected; there were fantastic views, it was in a central location and the amenities were as expected.
The apartment is walking distance to Condesa and Roma neighbourhoods (which have lots of bars/restaurants) and being by a main road it is easy to pick up taxis or order Ubers. Future travellers should be aware that being on a main road despite being 10+ floors up results in traffic noise 24h a day. We are both heavy sleepers so this didn't bother us.
Another unexpected bonus was having a concierge/doorman who was able to look after our bags as we had a late night flight and a mid-morning checkout.