As an argentine man, who lives just 15 blocks away from the place where this tragedy took place, I can tell you that this series depicts very well what happened THAT DAY.
The producers of the show did a great job by adding fictional and multi-personal storylines which made the plot even more engaging.
They managed the flashbacks, flashforwards and then just the present time in a balanced way.
As for the controversial band, "Callejeros", it's a shame that due to legal and copyright issues they were not able to use their original tracks fully and constantly but that doesn't mean that you won't be able to listen to great argentina rock & roll masterpieces such as Jovenes Pordioseros, Ratones Paranoicos and much more!
I highly recommend viewers to watch some real footage and documentaries about Cromañon (Damian Kuc's channel is a great choice)
All in all, great show but could've been way better with original Callejeros band music and maybe less clichés such as X person falling in love with Y person or X person being saved magically while Y just suffers the opposite fate.
RIP, our dear Cromañon victims!