I have been twice in Juan's studio and i had great time. The studio has perfect location for visiting Buenos Aires being only 3 km both from The center and palermo district. It is perfect equipped to have breakfast and meals in. There is a Carrefour market at the corner and nice bars and restaurants all around.
Juan was super nice guy and he allowed me early check in at 8.00 am !! If I will go back to buenos aires I have no doubts where to stay again :-)