The location of this apartment is fantastic - right near lots of great restaurants, public transportation, and the parks. Christian and his wife are very friendly and responsive and their daughter is super cute.
Unfortunately, I happened to be there when many things in the apartment broke (the washer, the shower, the internet) and the process of getting things fixed can be slow in Argentina. Fortunately, they did all get fixed and the repairmen were all very nice, albeit never showing up in the scheduled time period.
One thing I would check before booking is to confirm the construction in the building is over. This apartment faces the inner courtyard, which is where a lot of the cutting of pipes etc was happening, which is both smelly and loud. It also backs up onto where the pipes and things were being installed because I was woken up very early on multiple Saturday mornings by banging and sawing etc. Not ideal but certainly not under Christian's control. If you like to sleep in, it'd be worth confirming that the construction has ended.