The location is great, with amazing views. Easy access to everything, including mercados and sightseeing. The apartment has a great layout for 2 couples, with lots of space, and fairly "equal" bedrooms. There's also enough cutlery, plates, pans etc to actually serve 6 people. The pink hair dryer is also phenomenal. The air conditioners in each room were great, as were the blackout shutters for pitch dark sleeping.
However, if you have a lot of luggage it's extremely difficult to get up and down to the apartment (mandatory stairs, 3 elevators), so it might not be for everyone. We were able to check in early, and were told our towels would arrive "soon". Our towels arrived at nearly 11pm that night, 8 hours after check in! the fixtures are described as luxury, but they're old ikea cabinets etc, and most of the more frequently used items (faucets, towel hangers) were close to falling off. There were some basic cleanliness issues like black mold in the shower, dirty cups in the cupboards, etc. It was also surprisingly loud in the apartment given the area during nighttime (10pm to 1am).