Full disclosure - I write the irregular Malleus review column on English and German language audio drama for the radiodramarevival website. I am otherwise not involved with this show.
I think you'd be hard pressed to find a better champion of modern audio drama than Fred Greenhalgh. He's talented, passionate about audio drama, and young in the best way - constantly exploring, discovering, and expanding. As much as I respect the wisdom of audio drama's elders, who are often featured in Fred's interviews, their strong views often blind them to corners of the field that are blossoming. (Such as, say, professional snobbery towards internet-based newcomers, or genre fiction.) If I could have Tom Lopez or Yuri Rasovsky host this show, I'd stick with Fred.
Fred casts his net wide across the field of contemporary audio drama producers and dramatic subjects. I've been listening avidly to audio drama for about 25 years, and Fred still manages to surprise me with new works and new artists on a regular basis. And he broadcasts complete stories, not teasers, that you can download for free (some for a limited time only, so keep up to date). That "try before you buy" model is pretty rare when it comes to professional contemporary audio drama. I think it is valuable for both sides, giving enthusiasts a good idea of what's out there, and helping producers build an audience for their work.
Fred has an ear for quality as well. His show has featured the work of modern luminaries such as ZBS, Crazy Dog, Sue Zizza, and AMFM theater (you must hear their "God of the Razor" adaptation!). Talented amateur productions are also featured. Unlike many other shows, OTR (Old Time Radio) is barely a presence, which I count a good thing. I love OTR, but this show's focus on contemporary work sets it apart.
The dramas are clear and broadcast quality. I find the phone interviews perfectly listenable, and must respectfully disagree with the previous reviewer.
Naturally the best thing to do is sample the show and decide for yourself. I'm confident that once you give it a try, you'll be hooked, entertained, and much better informed about contemporary audio drama.