Guest here for both a 6 day and 2 day stay. Very clean, comfortable accommodation with friendly staff (although occasionally some English-Spanish communication issues.) Accommodation standard certainly superior to its 3* class.
Great San Telmo location right in the heart of the antiques market, although in future would probably chose a location further north in the city to access Retiro and Palermo more easily, but that's more a personal thing. Metro station 10 mins walk away and very convenient.
Main disappointment was the breakfast. Having spent the past 6 weeks travelling through South America, the breakfast here was one of the poorest of the 10/15 hotels of similar grade I've sampled. Definitely the most limited of the 4 Argentinian hotels I've stayed in. The selection on offer was of good quality, but I would have liked some ham/scrambled eggs/ fresh fruit options too.
Apart from that, a great hotel choice for a clean, convenient and comfortable stay in Buenos Aires. More