"Tourist trap" - will be my words to qualify the ...

"Tourist trap" - will be my words to qualify the in 2 words.
To detail it more, i will put it in 2 categories: pro and cons.

Pro:
Dancers where good. I'm not an expert on tango, but i liked this part.
Pickup from hotel, so it quite easy for a tourist first time in buenos aires.

Cons:
Everything was crowded, in order to produce more money.
Bad visibility. If you are front on front rows central, don't expect too much. Even if they have some TVs on the wall, the visibility is not so good for the price they charge.
Food and drinks, For a country with a rich couisine, food and wines are more than disappointing.
Story is all in spanish. Which is understandable, but show didn't made too much sense. Story begin with origins of tango in poor neighbours, then out of nothing a song of evita "don't cry for me Argentina", again dance and closure with scenes of tango from movies.
At the end they hand over some leaflets of recommended 10% tip, which is annoying considering the priced they charge.

Overall feeling is disappointing and gives sensation of greedy: big place to grab your money for lousy services.
My recommendation is to try to find more authentic places in this beautiful city.