I am pretty split on this book- the first 10% and the last 25% are pretty good. But the majority of the book is just everyone hates the main characters and is out to get them. Everyone. It gets real old.
First, the good:
I really liked James and Thunder Paw's interactions.
The effects of the physical changes on the players' psychology was definitely interesting.
Grel'Darm's alpha strike and how Roxxy tanks him is pretty epic.
The overall MMO feel was done very well, in terms of battle, PvP vs PVE, class weaknesses (some of which were very clever).
The last quarter of the book is excellent, but there is a long grind to get there.
Cons:
Man this book is... Exceedingly hostile. At least for me, there was not enough up moments in the middle 2/3 of the book. And it is not a short book. If it wasn't for Rachel's other books being so fantastic, I would have just given up partway through.
This premise has been done to death. Normally that would be ok with strong characters or some good twists, but I don't think "Everyone is a murderous jerk out to get you, and your only allies are marginally less hostile and substantially more self destructive" is really sufficient.
No one ever points out that they had nothing to do with the world of FFO turning into a nightmare? Admittedly they played it as a game after the fact, but they were not the cause.
I think Thunder Paw was the only NPC that didn't try to kill them on sight up until the last part of the book.
Why does James put up with so much abuse from Arbati? James is significantly stronger, and every time he just shuts up and takes the abuse it just seemed.. out of character? Nonsensical, I dunno.
Everyone despises Anders for what he did while he thought he was hallucinating, and he had every reason to think so. I could see smacking him around a little, and doing much worse if he did it after he realized it was not a hallucination, but that level of ostracization seemed way over the top.
It was not very clear exactly what skulls were supposed to mean either. I didn't figure it out until I read the glossary at the end.
I might buy another book in this series. Maybe. Hard to say.