I stayed at this apt for approx 6 week and was working remotely w my home office in North America. WIFI (which was a high priority for me) was spot on. No issues there and the connection was great! The apartment is really well located in the heart of madrid - everything is nearby including a nearby supermarket (5 min walk). Place is perfect for a single person. There is a smell of "humid" that comes from the washroom which was unpleasant (but it isn't enough to be an issue for me). Overall, a great place and I'd have no issues staying there again if i returned to Madrid. Stela (a neighbour) is a super sweet lady :)