I thought the "challenge" was a little on the obvious side, but then it's the sort of thing that would be obvious to someone not undergoing it.
Book's reaction to the Kweijian artifact was probably David Ajala's best work on the series so far, really great stuff.
Moll usurped the Primarch perhaps a little too easily, but I like Eve Harlow's performance enough that I really don't care.
Lastly, it's a small thing, but I thought the Badlands looked really great. They finally seem as hellish as they've always been described.
Once again, I can confirm that this giveaway is legitimate - good luck!