I give them a high rating because I am an Anglophile and understand British slang very well. I suspect your mileage may vary, especially if you are unfamiliar with British idiom. If you subscribe to BBC America and like British comedy, pour yourself some tea (or warm beer) and sit down with this one.
British comedians, Dawn French and Jennifer Saunders perform a series of sketches that are delightful send-ups of popular movies, such as "Silence of the Lambs" and "Thelma and Louise". They are supported by their usual stable of very funny people, most notably, a surprisingly butch commando in the "Alien" sketch. (Ms. Burke appears in "Absolutely Fabulous" as the nearly unintelligible Cockney go-getter who rushes into magazine meetings, throwing catch phrases at her ditzy staff and then rushing out.)
There are a few things that Americans might find puzzling, like a parody called "House of Idiot", but if you've watched PBS at all, it is not a stretch to figure out what they are doing.