What a brilliant use! I'm yet to fully test such a long print like that - I thing the longest I've done so far is around 15h.
I was genuinely concerned when I saw the print time in Cura, I wasn't sure if the printer was up to something like that, if something went wrong, and all that filament potentially down the drain..
I checked up on it occasionally, but it just printed like a champ and my concern was put to shame.