I was there for a planned 3 month business period. I decided not to stay.
Good points: the apartments are located in front of the metro (3 different lines); there is a small supermarket right in the building. Apartments are clean.
But: noise isolation is not good towards the street and other apartments; apartments are dark because of small windows (and I was one of the superior class...): it is mandatory to leave the light turned on during the whole day; wifi is slow, even saturated after 10pm (though charged 40€/month); a few TV channels, only in spanish in a tiny tv screen; no iron (one must go to the common laundry in the building); laundry closed on sundays; not many ustensils in the kitchen; mandatory twin bed 1.80 long ....
This can be good for a few days to visit Madrid, but I would not recommend it for business, when people have to stay several weeksMore
- Room Service