Just finished watching it, and it felt a bit strange, almost as if early parts were missing. But the action scenes are pretty great, and justify watching it by themselves (as the rest of the show isn't terrible or anything).
As far as air action scenes go, the best I've ever seen in the style may be Macross Zero. it is a prequel to the Macross (numerous) series, but it can be watched by itself - it may even work better on its own, in a way. The story is interesting, with great landscapes as backdrop.
But most importantly, it's the only show I have ever seen where transformable mecha somehow seem to make sense as a military vehicle. The action scenes are that good.