Great place on Chueca' square with everything you need at your doorstep. Quick access to the metro system, lots of bars and restaurants, bakeries and a small Carrefour supermarket with a good range of products.
The flat is as described, good size, lots of light and clean. Fully equipped kitchen if you want to cook on the flat, but with all the nice bars downstairs, I doubt you'll be cooking much on the flat. Nice coffee machine (pods) as well.
Check-in super easy. Lucia was waiting for me at the flat and communication with her was perfect.
If I go to Madrid again, I would definitely stay in Lucia's place again.