In a nutshell, I wouldn't go on an Antarctic cruise without this book. It could be the model for how to do a user-friendly, thoughtful, general field guide for a relatively limited area.
It would be sufficient for general ecotourists, and helpful for most birders. However, I imagine that most here (myself included) would also want to take The Complete Guide to Antarctic Wildlife, by Hadoram Shirihai.
Here's my full review of Antarctic Wildlife
FYI: this was published in the U.S. by Princeton University Press (the version I reviewed) and in the UK by WildGuides.