My friends and I enjoyed our stay at Isaac’s place. It’s perfect for traveling on a budget with friends in Madrid. Great location, clean, and they even provided an extra mattress we didn’t expect. We expected a lockbox but met up in person to get the key—not a problem, but a component to keep in mind, especially since that means only one key for the whole group. The level of supplied items was not unexpected, but potential guests should keep in mind it’s pretty bare bones. Very little toilet paper, no spices or coffee (but there’s a moka pot!), no cleaning supplies (besides dish soap and a sponge) as far as we could tell, etc. The power briefly went out, but they kindly helped us immediately. That being said, certainly worth the price despite having to purchase a few extra things. Lovely minimalist/modern apartment that we’d recommend as long as you’re happy living in close quarters.