I've seen this recommended a few times here, and I've listened since the beginning. I'd recommend it. But it would be hard to catch up after nearly 14 years and 187 episodes (probably averaging an hour?) - I wonder if there's a shorter history of English somewhere.
Is it still in production? I mean are new episodes still being released? Because I haven't finished the first episode yet, but if all episodes are as interesting as the first, I'll finish all those 187 episodes in no time. Hahaha.