Overall a very good compilation of first-person accounts of the title unit (the same unit from the Pacific mini-series). As a supplement to "The Pacific" I liked that it included a lot more members of the unit and the book was actually far superior to the mini-series. I thought that David had a more informal, less academic writing style that was a little off-putting at first, but over time it fit in very well with the accounts and events he was writing about. The book is well-documents (plenty of citations) with a lot of books and accounts I now want to read.
I thought that David captured the experiences and miseries of the Marines in the island hopping campaign, which provided an interesting compare-contrast with the experiences of the paratroopers in Stephen Ambrose's "Band of Brothers" book. One of the take-aways from this and a recommendation for reading both books, is that in Europe, the infantry-paratroopers were usually well fed due to relatively stable front lines, were able to regularly "liberate" supplies of alcohol, and were able to obtain relatively reasonable shelter in towns and farms. And German soldiers were far more likely to surrender peacefully when beaten compared to the Japanese. In contrast, the Marines were living in foxholes and fighting positions in high heat, humidity, and heavy rains against a foe who would not surrender and fight to the death. I highly recommend reading both books back to back.
Finally, while David focuses on the individual experiences at a tactical, company level, he still manages to weave the strategic planning and decision-making into his narrative to provide an understanding of events not available to the average Marine rifleman.