눉It can be really(!) noisy till early morning. The windows look to the very narrow and busy touristic street full of bars and restaurants with outdoor seating. Just don`t forget earbuds and you will be fine.
I stayed in the end of October and it was VERY cold outside and inside the room. It was literally freezing! But! As I said I was provided with extra blankets without even asking for it and it helped a lot! Just be prepared for it during autumn-winter months. (Should be just great during hot summer btw).
눇The location is amazing, I`m sure that it`s one of the best you can have. It`s 3 min from Cathedral and 30 minutes on foot from Alhambra. It`s located in city/tourist center, so basically it`s close to everything. What`s important Granada is quite hilly city, but Antares is in flat part.
You will fall in love with the host (or probably the owner)! VERY kind, very helpful, extremely charismatic! According to other comments here and my own experience I can say, that he treats everyone like his own guests if not to say children. It`s even little bit unusual but you will remember you stay. He helped me with everything - upgraded my room for free, gave me extra blanket, drew me the best (really) walking route on a map, we had a great small talk about Russian culture, writers and composers. :)
The room was clean, bathroom is very clean as well, everything smells like hand soap.
The price/quality ratio is perfect. Its great for low budget travelers who want have a rest from hostels in a small, but private room.
Wi-Fi worked perfectly.
P.S. Let the Shostakovich spirit be with you, Javier!