I first listened to the BBC radio broadcast and loved it. Later I read all the books in the series and became a fan for life.
This series follows the books and radio broadcast almost word for word but as someone pointed out earlier, like most books, your own imagination makes it better, provided you have one. I must say though, being a long time fan, a friend bought me this series on two VHS cassettes which included a paper back copy of the 1st book and have to say, I did enjoy it.
The movie that was made in 2005 was a huge disappointment so if you want to watch it, instead of reading or listening to it. I definitely recommend this series.