Yes, the Birtles story was without doubt the best part of the show. It would have been a lot poorer without it. Well done Warren.
The producers got their value out of the Back of Beyond footage, doubling for all sorts of things. Even the Jack the Dogger character from Back of Beyond stood in for Birtles at one stage.
But overall the stories were absorbing and interesting and well told I thought. It has a cab 12 CMP in it and any doco with a CMP just has to be good!