Tom Holland (whose book, Rubicon, I really liked) tweeted yesterday:

The best up-dating of the Trojan War by miles is Dan Simmons’ Ilium: the Iliad restaged on 30th century Mars by nano-enhanced super-humans (aka the gods).  A plus is that the novel also features dinosaurs.
Yes, Olympos is equally good. Anyone with an interest in the Trojan War who hasn’t read them has such a treat in store.

The best up-dating of the Trojan War by miles is Dan Simmons’ Ilium: the Iliad restaged on 30th century Mars by nano-enhanced super-humans (aka the gods).  A plus is that the novel also features dinosaurs.

— Tom Holland (@holland_tom) February 17, 2018

Yes, Olympos is equally good. Anyone with an interest in the Trojan War who hasn’t read them has such a treat in store. https://t.co/mZ2Ibkm4yi

— Tom Holland (@holland_tom) February 17, 2018

I've also read Ilium and Olympus.  My reviews here and here.  

I'm not quite as enthusiastic about these books as Tom Holland.  In fact, in 2016 I put these books on my list of  10 Worst Books: Fiction.

But... on reflection, I was probably a bit too hard on these books.  

I was ultimately disappointed by the ending.  And that disappointment colored how I remembered the books as a whole.  But, I really enjoyed the books as I was reading them.  Dan Simmons definitely held my attention while I was reading him, and he did a very good job at re-writing the Iliad.