My wife and I stayed for just under a week at Tomas and Pablo's studio apartment.
The loft is as shown, it was clean and well decorated with everything we needed (including air conditioning, which was great in the summer heat). They had left a booklet with all the information we could need, including contact numbers for them, emergency numbers, local restaurants they recommend etc. The patio is a nice place to have a nice merienda in the afternoon, and the jacuzzi is functional.
The location is great, with a lot of food options, shopping and cultural sites within walking distance, and because you're right by a main road you can find a cab without a problem. Avenida Santa Fe had lots of people on it any time we travelled it, and we had no issues during our walks.
Tomas and Pablo were attentive to any needs and were available to us the entire time; for example when we arrived we found the corkscrew was broken, and mentioned it to Pablo -- within like 15 minutes we had a new corkscrew at the doorstep.
Overall we enjoyed our stay and would come back. Tomas and Pablo have an excellent loft, in a great location, and were communicative + attentive hosts.