Currently, I have the StarCraft Archives (Liberty's Crusade, Shadow of the Xel'Naga, Speed of Darkness, and Uprising), I, Mengsk, and the Dark Templar Saga. I'll be getting Ghost: Nova and Queen of Blades at the end of June, and here are my thoughts thus far:
Liberty's Crusade is decent. Not particularly good, not particularly bad, but really hard to recommend to anyone. It's not good enough to say it's worth reading if you're not into StarCraft, and if you are into StarCraft, you've undoubtedly already seen this story through the original game.
Shadow of the Xel'naga is the reason I've yet to finish the Archives... It's horribly paced, feels like there's nothing going on, and makes it difficult to care about any of the characters. I hate saying this since the first ever novel I read was actually written by Kevin J. Anderson, one of the two writers who wrote this story, but... I'm sorry, it's awful. I'm eight chapters in, and I don't want to continue at this point.
I've yet to read Speed of Darkness and Uprising, I'll comment on them some other time.
I, Mengsk is a really good book. As you can probably tell from my choice of avatar, Valerian is one of my favorite newer characters to the series, and I mostly got it because he's a character who actually reminds me a lot of myself (personality-wise, I mean). It really gives a lot of depth to both Arcturus and Valerian, and paints a much clearer picture of them than you get from anywhere else, and actually caused me to cry at one point (shut up).
The Dark Templar Saga, however, is nothing short of masterful. I can say that not only is it good enough to recommend to people who don't like StarCraft, I can say it's good enough to recommend to people who don't particularly like the Fantasy/Sci-Fi genre in general. Once I hit chapter 4 or 5 of the first book, I couldn't put them down until I finished the trilogy- and every character they came across felt very much like a person. You'll laugh, you'll cry, you'll find a story that will be remembered for years.
Edited by MarioFanXV on 5/7/2011 1:18 PM PDT