i have spent 3 nights with my father on Eduardo's lovely apartment and we had a very pleasing experience. The apartment is very comfortable and I would definitely recommend for both short and long stays. There is plenty of sunlight and good space to store your luggage without disturbing the rooms. Both beds are very comfortable and the blinds really keep the early light away (which is very important to me, since I am a very light sleeper. It's also quiet!). The kitchen is equipped with all the essentials (but I hope you just use it to prepare your breakfast, since you really don't want to miss the argentine cuisine) and has enough room for quick meals. Internet is also fast If there is one downside (that hasn't bothered me at all, but is worth mentioning) is the shower. The boiler is a little small, so it is not possible to take long showers or even taking a shower after someone has taken. Besides that, everything was really nice! The location is great, Palermo Soho is filled with nice cafés, restaurants and there is a milonga in walking distance. The street is also known for it's shops and outlets. The subtle (subway) is 15 min walk away and the neighborhood is safe.
Eduardo and his brazilian wife Gisele were really kind and responded to all my emails very quickly. They are tango-enthusiasts and may give you great tips on that matter. Don't miss them!
I would definitely recommend this apartment and would come back on the next opportunity!