I disagree with the negative comments about the show. This show is about family and the lengths that one man will go to provide and protect his family. It just happens to be set to the backdrop of an alien invasion and global armageddon.
There are a few points in which the writing/editing seems a bit choppy and confusing, specifically at season changes three to four and four to five. In both instances a perceptive viewer will catch up. The show flows much better watching it without commercials and in three hour segments than it did on its original airing on TNT. The commercials and episodic gaps made tough to watch. I recommend rewatching it on HBO without commercials.
In closing, it is a fun show with good baseline values shared by very flawed people whom are facing the everyday challenge of making difficult choices that others are unwilling or unable to make.
