We just loved Ralf's apartment!
It is exactly as described, very clean, cozy and with incredible amenities (not to say the BEST view!)
You'll find anything you need at walking distance: restaurants, groceries, pharmacy, subte station nearby and even an outlet shopping center.
Ralf's team communication is great, the check in is timely and they were available to support us during our entire stay.
I recommend and intend to stay here once again in a future trip to BA.