If you only need a bed in a great area in Buenos Aires mainly to crash out for a couple of days, this flat will be ok. It's in Palermo, which is one of the best areas in BA. However, if you want a bit more from a flat, or just to relax, this place might not be for you. It's on the second floor of a very busy street, and it's really noisy from early in the morning until late at night with buses going past regularly. To make matters worse, there is an old fridge in the flat that makes a really annoying noise, especially at night (enough to disturb my sleep). There was also a neighbour who constantly played techno music until late and as I was there for work, this was a problem. I'd suggest bringing some earplugs to help deal with the noise!
I really appreciated the host waiting for me when I was checking in late, but less appreciated was the fact that they didn't tell me that the balcony door could not be locked. I noticed this on my first day, and they did come to fix it. However, when I asked if they knew about the problem, they simply said 'oh I forgot to mention it'. Given I was a single female traveller, the lack of concern for my safety and security was worrying. Overall, while this place might be ok for some, I wouldn't go back.