do you speak spanish? if not i´d recommend going on a night when they have a puppet show or something that does require spanish to enjoy it.
food is good but not amazing...if you don´t mind the price it is definitely worth it. the one in palermo has appetizers and entrees from $25-60 pesos, which is a lot. (more than casa cruz, thymus, and other ´nice´ places.) do factor in that there is no extra charge for the show. again, if you don´t mind dropping the cash, it would be a great date.