After having anticipated this for years, I was rather hesitant to watch it initially because I had heard some mixed reviews and some of the early clips I saw looked very heavily CGI.
That being said, while definitely flawed, overall the series delivered fantastically and am glad that media like this is continuing to be made.
Some of the criticisms I've been reading in the reviews are the classic Brit/Euro inferiority complex non-sense you see on literally every U. S.-focused WW2 media. "We did stuff too. It's not all about the USA. Blah, blah, blah". Let's be honest. They saw the depiction of the RAF officer early in the series and instantly soured on the whole show. This is a mini series about the USAAF, NOT the RAF or some other Allied faction. You just can't tell that many stories and do them all justice. The scene in question represented a very real debate at the time and AGAIN, this is shown from the USAAF perspective. Any of these assertions that this was undermining the RAF's contributions or that the U. S.'s strategy was superior and morally better than the Brits' is just absolute non-sense and total projection.
Similarly, the whining about the "tokenistic" depictions of the the French and Dutch resistances, as well as the Tuskegee Airmen are unfair. This series already struggles by trying to tell so many stories in one overall piece; it would be impossible to fully delve into any of these topics in a 1 hour show, over 9 episodes. On top of that, if those groups weren't included at all, then that would have been criticized, as well. I applaud the writers for including them as best they could, although I will acknowledge that it was hard to follow every storyline and some seemed shallow or without real conclusions.
On the heavy use of CGI...I was worried that this would become a bit too distracting and make everything seem a bit fake, kind of like Midway, however, it just would not have been possible to depict the scope of the air war the way they did without it. Overall, I think it was pretty good, and you get some pretty amazing visuals that, to me, are worth it even if it's a bit much at times.