I thought it was a miss. There are some great moments and solid eps (the Munster raid, the beginning of the last episode, and some others) but overall it was not what I'd hoped for after ten years or so of bouncing around for development.
It seemed like they originally planned on having more eps, or longer episodes. All of the episodes except the last were well under an hour and you can see plenty of loose ends throughout the series that I'd imagine they planned on including. The aircrew getting helped back to freedom back by the French resistance, in one episode they're beginning their journey getting hassled by the germans on a train in disguise, the next they've just teleported back to the airfield. There was absolutely more that was intended to be shown. Cros' love interest plot was clearly supposed to be more involved, then abandoned. Big Week, the D-Day raids, the destruction of german fighters (even preceded by an end of episode cliffhanger about how the bombers were to be used for bait, etc), were handled off camera with some limited discussion of the aftermath.
The most egregious example was the Tuskegee airmen subplot. I really don't know what the plan there was. They had some great actors, the story is excellent (if not related to the 100th we've been following up to that point), and they got an absolutely trash treatment that really should have been given a lot more resources, removed, or given it's own show. The writing for those characters was incredibly bad ("Nooooo..." "You're gonna pay for that!", etc), the characters were given little introduction beyond the most surface level acknowledgement that racism impacted their lack of promotions and the cliched girl/job waiting for them back home.
The group was famous for their bomber escorts, and the only time that was mentioned was in the PoW camp where one prisoner says something to the effect of "Red Tails! You guys saved our ****** so many times". Instead of getting any examples of them escorting bombers (in, yaknow, a show about bombers), we get two ground attack missions in the worst CGI of the series. You get a little more of them in the PoW camp, then just nothing.
The PoW camp liberation, beyond being fictional, was also crazy. P51s hitting the machine gun towers but sparing all of the densely packed PoWs, german guards ripping MG42s into the crowds of prisoners without doing any damage, the semi-auto KAR98K in the guard tower, the running up the tower to hoist the American flag, all of that, just bonkers.
There's the bones of something really cool there, and with so much crossover from BoB/the Pacific, and the creators marketing it as a similar product, I was pretty bummed out with what we actually got.