Alfonso's apartment was great, right in the heart of Madrid, walking distance to all major attractions. Couldn't hope for a better accommodation. The place was sparkling clean, with all the amenities you would need. And, despite being on a very busy street, it was amazingly quiet. Please be aware it's on the 5th floor, so there's a bit of hiking involved, but that wasn't a big deal to us. Also, Alfonso was great communicating with us, replying almost immediately to our messagers. I highly recommend him and his place!