I stayed at Dani's place for 2 1/2 weeks on my first-ever visit to Argentina, I had a fantastic stay. It's the perfect combination of all the accomodation options - the privacy of a hotel (your own bathroom, private rooms), the charm of a b&b and, like a hostel, enough rooms communal space so you get a chance to meet people.
Both Dani and his house are full of charm and character. Dani is very relaxed and friendly but crucially, really professional when it comes to looking after bookings and rooms. He was also very helpful with exchanging money.
The building, which used to be a bed & breakfast, is stunning and very unusual.
Perhaps Dani's place attracts good things because in my 2 weeks there every other guest I met was very friendly. Making breakfast or sharing wine with others guests and Dani really made it feel like a temporary home.
Very highly recommended.