Angel's place is exactly how he describes it: it's well located (really close from Aeroparque and Retiro train/bus station), it's clean, it has plenty of stores (supermarkets, bakeries, bars) within a walkable distance for you to get what you need. Ex: Recoleta cemetery is at 10-15 minutes walking distance; Carrefour supermarkey is 3 minutes away and so on.
The neighborhood is one of the fanciest and safest of Buenos Aires.
At his place you will feel like if you were at your own home: you have TV, air conditioning, big and open spaces, a balcony to go and read or drink a beer if you like it.
When it comes to Angel himself you will find a laid back guy that it's always willing to help you with whatever you might need. In my case, it was finding the TV channel in which Barcelona was playing (a really irrelevant "need" but he helped me nonetheless) or asking directions to get to the cemetery.
Angel's place is definitely a place to which I would return without hesitation.