I remember listening to this on Radio 4 on headphones when it first came out.
Some of it works just so well on radio (rather than TV or film).
For example in the first episode when the Earth blows up, on headphones the sound of the earth blowing up just seems to reverberate through the universe (or your head when listening on headphones).
Then the next line from Ford Prefect is "Would you like a peanut".
I just love the contrast between one moment the earth blowing up the next moment Arthur is being offered a peanut.
Sadly when it was made into TV programmes and films some of the subtle script was lost.
For example after Ford has offered Arthur a peanut Arthur asks Ford where they are.
"We're safe" says Ford "We're in a storage hold in one of the ships of the Vogon constructor fleet"
Arthur comes back with the lovely line "This is obviously some strange usage of the word safe I wasn't previously aware of.
But in the film of a few years ago they have the same question "Where are we" and the answer "we're safe"
But the following line is totally missed out, losing one of the classic lines from the original show.
(I realise that script changes have to me made when moving from one medium to another, but to throw out classic lines like that just seem a great shame)