Sheila's place is a beautiful, historic home in central San Telmo. It has extremely high ceilings and comfortable spacious bedrooms. The kitchen is easy to cook in, equipped with most things you need and six burners on an industrial stove (more than enough for my family of 4!) Of course in historic homes there are a few things that will work differently than in modern apartments, but that was part of the charm in my opinion, and felt like home to me. Wifi was fast and worked really well (except the kitchen a few times, but that's the farthest away from the router). Just a few feet away it worked fine all the time. The value for the money was good as well. One thing to note is that you have to walk up two flights of stairs to the apartment door - if that is a concern for you, it's something to consider.
The location is awesome for tourists - there is a artsy fair every weekend, sidewalk cafes open and a view to flamenco and tango dancing from the balcony. You can be part of it or just sip your Malbec and take it all in. You can walk to ice cream shops, boutiques, restaurants, and the central business district, buses around the corner and Subte a few blocks away.
Check in and out was easy and communication was great with the manager and the host. They were very flexible for the needs of my family and young kids, which I appreciated a lot.
I highly recommend Sheila's place for your stay in Buenos Aires!