Jose is a great host and his place in Lavapies is an ideal, fun, and centric location. I stayed for 8 days doing research at the film library (next door).
The room has a great view of old Madrid and the bed is a decent twin with a pullout beneath for a guest. In the very hot summer months of July and August it can get pretty hot being that it is on the top/attic floor but there is an AC in the room to keep you cool.
I used the kitchen daily and it had everything you could need. The washer is very convenient and easy to use. There is a cable, and for English speakers there are channels without the typical Spanish dubbing which was a welcome treat :) The bathroom is also quite large. Overall the place is spotless.
I would mention that the fridge did not seem to cool all that great. Might have been the particularly high temperature I was cursed with in Madrid on the days I was there (?).
José was attentive and kind throughout. I would recommend his place and stay again!