Good to watch and discuss, I think, but not with kids too young
The sirens are definitely suggestive, but that went over the head of my then 8 year old. Other than that it's a great story. My older child (then around 11, I think) had read the odyssey and really appreciated the parallels. There's also a scene very much reminiscent of the wizard of oz.
I thought the depiction of racism and the KKK was shocking, but in a good way. It's a part of our history that it was good for the kids to see.
There is also some violence, which I am usually sensitive too, but over all, I thought it was good.
Parents should know that there are some not so good scenes in the movie. There is a scene where sirens seduce a group of men. There is also frequent language (god***n, s**t, etc.) There are some violent moments, but overall it is okay for tweens+