We had a fantastic stay at Sabrina's place. Whilst we didn't actually stay in the apartment we had originally booked due to an electrical issue, Sabrina arranged for alternative accommodation nearby. The whole process was seamless and very well managed. Sabrina was great with her communication through the whole stay and was always available to meet in person when needed. Whilst I can't evaluate the apartment itself, the location in Lavapies is amazing and by far my favourite part of Madrid. Everything is walking distance or a short metro ride away. There are many great eateries nearby and Sabrina had lots fantastic recommendations.
Regardless of which of Sabrina's apartments you'll stay in, Sabrina will make sure you have the best possible stay.