Stayed 5 nights in Rosa and Oscar's appartment in September 2018. Communication was great and on arrival Oscar met us and suggested lots of areas to visit and explained on a map where everything was which was very helpful. The appartment was lovely and clean and had everything we needed. There were lots of little bars and cafes just round the corner. The appartment is also 2 minutes walk from the Mercado de San Miguel so very handy indeed.
There was a lovely touch of 2 wee bottles of Rose wine left in the fridge for us to enjoy during our stay which I thought was most kind!
I would not hesitate in recommending staying at Rosa and Oscar's appartment when in Madrid. Great hosts too.