I tried this audio-book out, as I was looking for something to listen to on my walks and Metafilter had recommended the John Cleese recording. It was a disappointment. I made it ~30% of the way through before getting tired of the epicycles and quitting, before becoming bored with walking/house work and listening to another 30%, quitting, and then repeated the process one more time to finish the book off. Apparently everyone who has ever lived or voted differently than Mr Lewis has done so because they are controlled by demons. And of course all those people he disagreed with will suffer in hell for all eternity. If nothing else you have to admire the chutzpah of the man.
Edit: After further reflection, I am bumping up the score by 0.2. Half of that is for the ending, where a person is sent directly from an explosion into heaven, and I like how it parallels later Islamic writing by suicide bombers. The other 0.1 is for the point he makes about just because something bad happens, that does not make it the truth or reality of life that was hidden. E.g. a community is a nice place for 20 years, and then is riven by violence, that does not make the violence the truth of the place. If anything the longer lasting peace could be said to be the more accurate description of the place. This is a point that I think is both correct and not said enough.