It's high-brow entertaining, I think, but varies from episode to episode. For example, there was an older episode (premium) episode where they talked about how Kitchen Nightmares is actually extremely left-wing, which was exceptionally entertaining, and then there are episodes like
this one (interview with a guy who has a podcast called "Working People" where he just talks to working-class people about their lives and stuff) which isn't funny, but I'd still call entertaining in that it's an interesting conversation to listen to.
Then some of their episodes are a bit dry and more on the educational side, for example interviewing Noam Chomsky or asking a couple economists "so wtf is MMT".