If you are going to Madrid with a group of 3 or more: look no further. Location is the best Madrid has to offer: train station, main museums, historical area: everything is within walking distance. Check in is easy and painless; there's a luggage safe in the Atocha train station, right across the street. Just make sure to comply to government mandatory online registration before your arrival or check in; it's online and very simple, ask host about this ahead of time. Place is comfortable, clean, spacious. I would recommend this place 200%. There's all options for food around: from McDonalds to authentic local restaurants and cafeterias, and supermarkets within walking distance. There's even a gym from a 9 min walk. Nightlife around is great as well. Location has everything. Don't worry about stairs, there's an elevator.