Unbeatable location- far exceeded expectations. Steps away from the metro, located along Plaza del Sol, within walking distance of many sights and great restaurants. Apartment was spacious and clean, and could have easily fit more than 2 people. Communication was great- host replied within minutes.
There were two disappointments. The first was that the electricity didn't seem to work properly. A breaker kept flipping, which shut off the AC repeatedly. The host offered to send a tech during our stay, but we declined. The real disappointment was when the breaker flipped and shut off power to the fridge, causing all the food we'd just purchased to spoil. Very sad about that. So, may not be an issue if it gets fixed, or if you don't plan to buy perishables.
The second reason I gave 4 star instead of 5 is that there could have been a few amenities to improve our stay, importantly, more towels. There were two of us and we stayed 5 nights, and were given only one towel and a hand towel each. It would have been nice to have a couple towels. The apartment does not have cooking basics, like oil and salt and pepper, so just plan accordingly.