I was a huge ancient and especially Greek mythology and history nerd as a kid, haven't really read the translations since then but I knew the general themes and outlines.
I think it was very good, there are flaws of course, like yeah, even in non-IMAX theater some parts were genuinely deafening, but it kind of fit with the scene where it was happening where those sounds are supposed to make you uncomfortable and disoriented.
Other then occasionally being too loud, none of the previous Nolan criticisms of his films really apply for me (well, a bit underwritten dialogue has been plaguing him his whole career so I'm not counting that), the dialogue is perfectly audible, there is no super convoluted plot or excessive time jumping, yes some of the messaging can be a bit on the nose but that again, is just Nolan.
The movie looks gorgeous, the soundtrack is great, performances amazing, it's not boring and the 3 hours breezed by for me.
There were parts where I would have wanted to see more, or less, but overall it's a very good movie.