It was a pleasant experience to stay at Jaime's house. The location is great, near two stations, or you can just walk to many places in 15-20 minutes, which is a nice way to see the city and enjoy the sun. The rooms is clean and tidy, and the restroom is the same. They also prepared some snacks and coffee, very thoughtful. I didn't meet Jaime until the last two days before I left. But he always replied me quickly when I had questions. Like he helped me to find out how to go to his apartment from the airport due to the metro is reconstructive. My friend was sick on the last day, I messaged him and just needed some translation so I can go to pharmacy to buy a medicine for my friend. Jaime offered to company me to the pharmacy which was really helpful. (Coz I had tried to communicate to Spanish in English many times but it didn't work out well)
All in all, it's highly recommended to stay in Jaime's house. If I ever came back to Madrid I would definitely stay there again.
Jaime and Gabriel, thank you for everything. :)