We went there twice in a week in Buenos Aires and were told it would be open on Thursday at 3 pm for a guided tour in English. But when we get there they tell us to come back tomorrow. Open hours in Argentina are very fluid, which makes it extremely hard to plan.
Stayed here for four nights in July. Rooms are nice, and breakfast was quite good. Young staff were nice and friendly, and helpful with all of our requests. The hotel will organize a visit to the tango show for you at a very reasonable price. No complaints.