There are very few audio dramas out there that I would call excellent. This is one of those rare shows. COTG includes a well-written story in a futuristic space setting. As you listen, you will stand in the presence of human military pilots who continue to fly their space planes in the battle against the aliens who took over Earth long ago. Each episode leaves your ears hungry for the next.
The best thing about this show is the audio production quality. The sound effects are wonderful, transporting you into the show's environment. The music choices are great, the voice acting is good, and it's all mixed together for a crisp, clean, high-quality product. Among the other top audio dramas out there, I have yet to hear anything this well-produced. I think when the sound environment in an audio drama pulls you in, you are more likely to go back for repeated listens, moreso than even a good story. CMack (the creator) has really put a lot of time and effort into this project.
My only caution is that I would not recommend this as a family show. I think it is most geared toward teen or adult males, which I think could have been avoided. The creator thought it would be most realistic to have the pilots talk like military personnel, so be prepared for rated-R language. Nine episodes in, themes and situations aside from language have stayed PG-13. And because the show is very much oriented around war and conflict, with a male-dominated cast, I think there will be a good number of females who, like my wife, find the show uninteresting.
If a well-plotted, high-quality, space-themed story about humans and aliens at war sounds interesting to you, give COTG a listen.