We stayed in this apartment for a week, family of 8 (6 adults and 2 kids).
The apartment was very comfortable for us to sleep in and get ready, living room was a little small for all of us to hang out at the same time, but we really only used the apartment to sleep and get ready, spent the rest of the time visiting Madrid.
We were worried about the noice from the disco or from the proximity to Gran Via, but it really wasn’t bad. If you are light sleeper get yourself the white noise app and that should help mask some of the noise.
The apartment is perfectly located short steps to Gran Via, couple of blocks up the street lots of shopping, couple of blocks down the street Plaza España and right next to it the Royal Palace. But also right down the street you have a delicious bakery, fruit store and a convenient neighborhood market/grocery store.
The two full bathroom were comfortable and easy to use. The 1/2 bathroom is a shower and sink, not a toilet and sink like most 1/2 bathroom in the US.
The bedrooms were also comfortable and roomy, Two of them has bed and sofa-bed. The beds here are double, which means slightly smaller than queen, but the sofa-beds were actually comfortable to sleep in.
Anything we didn’t have when we checked in but needed (hangers, pack and play, clothes drying racks) they brought in fairly quickly. The hosts are a professional hosting company and are very responsive.
We really enjoyed our stays and would use it again if we ever travel with a big group like this again.