We loved the location as it's really in the heart of Madrid and the apartment was quiet, which is important for me as I'm sensitive to noise.
If you're going to use the kitchen, note that nothing is supplied (salt, sugar, hand/tea towels, etc..) so you need to bring everything or buy groceries. There is a Dia shop very close to the apartment, which is less expensive than the Carrefour express.
Communication with the host was great. We'll definitely rent this place again.