Just finished the book after owning it a long time.
It was OK, but I had big issues with the thing that have been mentioned here already.
There was a lack of detail and a lot of goofs:http://avp.wikia.com/wiki/Alien:_Out_of_the_Shadows_trilogy_goofs
Hated the fact that there was a platoon of marines in the colony.
Seems kind of weird that platoon (30 marines) headed by a captain (Brackett) would be rescued by a squad (12 marines) headed by a lieutenant (Gorman). Having a couple of capable marines or some marshals (ex-marines) would have been totally fine.
Hated that there were 2 escape ships in the colony, having even 1 was ridiculous. The scientist escape ship hidden in some Dexters Lab style of a compartment that no one had discovered was quite convoluted.
I think the problem with the new EU is that they make them too tightly coupled with the movies. Each small detail that is out of place will be obvious for the fans. They should really try to avoid dates because they are quite bad with that. They should just have more self-contained stories with totally new characters.*Fixed the link. Hicks