While not finished the book, I have reached some overall impressions.
The beginning chapters of the book were very compelling. I agree that it seems rediculous that we are the only intelligent life in the cosmos, but, as of yet, we have no proof. The idea that 'our' gods would be the same or even recognizable to other beings is also very concited. It is possible, but very, very unlikely. Sagan articulates these ideas very well.
However (i'm currently up to chapter 15), Sagan seems to have lost his way. There are several chapters describing the history of space travel. While there are some jewels of discovery in these chapters, they seem very long compared to the value they provide to me. Sagan has now moved on to justifying space travel given the limited resources available (a problem that has only gotten worse since the writing of the book). After giving us lots of good reasons to spend the money elsewhere, he seems to say, well, lets do it anyway. The only reason that he gives that is even remotely logical is that we spend a small amount compared to defense and wishing that we could spend less on 'defense' (another problem that has gotten far worse since the writing). At this point of the book, he seems completely lost. I hope that he decides that he wants to say more by the end of the book. At the very least, I'll enjoy looking at the photo's!