We actually spent about a month and a half here and the place was great. The pictures do justice but fails to show how great the balcony is! As for the surrounding area, it's one of nicest areas in Buenos Aires. There is a strip of bar and restaurants that are very close but not close enough to disturb you at night (maybe happened once, but very rare).
The other reviews mentioned bugs - unfortunately this is true and is seems to be the common trend with the building and surrounding area as a whole. Thankfully Agustin was very responsive and understanding and was able to send a fumigator when we first moved in. In addition, the maid helps keep the bugs at bay. Nonetheless bugs occasionally would appear so if you can't handle baby cockroaches in the kitchen/bathroom then this probably isn't the best option for you.
Overall, the apartment is a really great spot in a nice area. Agustin is an incredibly helpful and friendly host (even helped us with our bags on check-out). I'd certainly stay here again in the future.