HG Well's The First Men In The Moon, publish in the late 1890's/1900's (somewhere around then) is my favourite novel of all time. I fell in love with this story after hearing Radio 4's dramatic radio play of the story starring William Rushton and Hywel Bennett, when I was a young child. How I wish I could get a copy of that radio play but I have never been able to).
I watched the earlier cinematic rendition of the movie but, apart from Lionel Jefferies awesome acting, I didn't care much for the movie. However, I saw a part of this new version on BBC and loved it. It is vary close indeed to the original including much of the dialogue. Like the previous movie it opens up on the real events of man landing on the moon, which, of course, never happened in the book, and I didn't really see the need for the movie to open up in such a way, however, we can't have it all. :-)
I loved the acting, the moon scenery (though the external shots were a bit lame, but this was due to budget constraints), and the selenites. The storyline does not stray too far from the book at all.
If you like the book then I would suggest you watch this version of the movie.