I've taken Spanish classes at Íbero for 6 weeks now, and it's been a great experience.
I started with the level beginners 2, but when I found this was too easy, I was easily transfered to a higher level, and now I've almost finished intermedio 2.
I have had two different teachers, Marina and Fernando, and both are great. They are highly skilled and the classes are very entertaining with a personal approach, which is a good environment for learning.
The current student coordinator, Danielle, is not only very friendly and helpfull, but also organises great activities for the students to discover the life in BsAs.
The school offers both morning and afternoon classes, but not always both options are available for one level. One tip: if possible, take dollars with you, 'cause it is cheaper to pay in dollars than in pesos (only cash is possible).
For me there is only one down side at this school. Each level consists of three classweeks, and students are allowed to join a new level even in the last week (while the level is already running for two weeks), which can be a bit uncomfortable for the current students.
Overall, I really enjoyed my time at Íbero and I wouldn't hesitate to go there again!