I stayed in the apartment on my own for two weeks holidy in October 2019. I really enjoyed it and would recommend it to prospective travellers.
There were several key positives:
The apartment has a great balcony. It's on the 8th floor and the balcony of the 9th floor (the top floor) is set back so doesn't overhang, allowing the balcony to get sun from midday until 5pm. I spent several pleasant afternoons on the balcony in the sun;
With the balcony doors fully open it's like having an indoor/outdoor apartment and it brings the lovely cool breeze into the apartment;
Location is very good. A 5 minute walk to the closest Line D metro station (Ministro Carranza) which takes you downtown (Catedral) in 20 minutes or so;
There are plenty of cafes and restaurants within an easy walk of the apartment. Notably, it's within a 20 minute walk of the famous parillas Don Julio and La Cabrera, but my pick was La Carniceria, a 15 minute walk and OUTSTANDING!
There are a number of mini-marts conveniently located nearby;
I didn't cook, but the apartment is well set up for cooking.
Matheo was an excellent host. He met me at check-in (even though I was held up for over an hour at the airport), he was very responsive to my messages during my stay and he attended check-out for the key handover.
I am sure you will enjoy your stay as much as I did.