I really enjoyed Earth Abides. It was one of the first 'post-apocalyptic' books I read as a teenager and it was one of the better ones. I particularly liked some of the disputes which arose later in the book around the murder (and it was murder) of the drifter to prevent his influence on the rest of the society. Raised all sorts of moral issues without any 'happy ending' as such.
I thought each segment of the book (coming to grips with the lonliness of thinking you are the only survivor, struggling to survive on your own, the joy of discovering you aren't the only survivor and struggling to build a functional society) were all very well done. I also cracked a smile at the couple who filled their house full of lamps, tea sets etc to 'insulate' themselves from what had happened to the rest of the world.