I would strongly recommend Pedro’s place to anybody looking for a home base while visiting Madrid! It’s a lovely apartment, very modern and clean and stocked with amenities. We especially loved having access to an in-unit laundry machine since we traveled light and needed to wash our clothes. The apartment has everything you want from soaps to dishes to olive oil and there was even a jar of olives in the fridge! Pedro was actually on vacation during our stay but his friend covered for him and was just as friendly and responsive as Pedro had been over messages.
The location is fantastic as well, just around the corner from the Lavapies metro stop and maybe a 15 minute walk from Puerta del Sol (the city center around which are most of the interesting places to visit). We were also just a short walk from the El Rastro flea market held on Sundays, and there’s a 24-hour grocery store right next to the metro stop where we stocked up on snacks and wine. I couldn’t imagine a better stay!