I got gatecrashing and have read thru it at length. I must say it's an excellent product and I'd rate it an over 5/5 in most terms.
I was pleased and gratified to see the "nuclear battery" issue I raised with the original EP book has been addressed and clarified, if my questions and thought on the atomic battery issue lead to the material for them being added to GC I'm glad.
I know that EP is supposed to be a leading edge hard SF transhuman setting, but I kind of gagged at the idea of a personal nuclear power source taking the place of nutrition and actualyl sustaining a player character thru nuclear power taking the place of energy produced metabolically by eating. I'm not sure that's very feasible....
All in all thought I still think it's a really excellent product that comes off like leading edge hard SF from Greg bear, Alastair reynolds or greg benford and give it double thumbs up without reservation.
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"I learned the hard way that if you take a stand on any issue, no matter how insignificant, people will line up around the block to kick your ass over it." -Jesse "the mind" Ventura.