Along with Ideal, The Mighty Boosh and Nightingales, I think it is one of the best ever comedy programmes. It is not uproariously funny but is very subtle, more subtle than the ridiculous Birds of a Feather and Goodnight Sweetheart. Like the other programmes though, you do need to remember that is is a comedy of characters and they take a couple of episodes to gel.
You can get programme set DVDs quite cheaply, from Play or Amazon.(I've just bought the series 1-3 of The Mighty Boosh for about £12 and the whole Nightingales series for £4.