We finally watched them all.  I loved every episode.  They were all As or B+s to me.  People say Metalhead didn't fit into the overall theme of the series, but I think it does.  I don't need the backstory.  I can take the story right were it is at face value.  The end was a weird twist for me that the 
Vox review of that episode really fleshes out better than I could.
I also disagree with a few folks here on their view of Archangel, but I don't know how to do spoilers, so I'll just shutup.  It would be cool if we had a test forum to figure out how to do spoiler tags.