This is an excellent apartment, close to the Castellana, in an area with multiple eating options and several metro stops. All three bedrooms are ensuite, the kitchen is bright and modern, the beds are comfortable, the building feels safe. Overall, it is a very good option, at a reasonable price. I would definitely recommend staying here.
That said, the property is perhaps a victim of good photography, which makes it look like a super-luxury, ultra-modern apartment. It isn't - it is perfectly nice to stay and a good price for what it is, but not a flash, swanky modern apartment. There is a problem with the electrics which fused four times during the stay, always when cooking, and the socket under the working desk looked as if it has blown out at some point. A small point, but the entry says "basics" are included like salt and cooking oil, but nothing was provided - not a teabag, not anything to cook with and just one dishwasher tablet and one washing machine tablet.