Call it modern, trendy, whatever you want; this is the best resource of current logo design trends. If you liked Los Logos get ready for more of the same which is a great thing. One of the new features is culture based classification including: corporate, culture, fashion, in motion + games, political + social, and even a unclassified section so one can see cool shapes and ideas even though they don't fit into a certain section.
One might dare to call it dated, but if you didn't notice yet today's design trends are quite the mix of decades. Logos range from the classic 60s hippie look, to disco stripes 70s, rock band 80s, and then into the techno style of late 90s.
People who will enjoy this book are artists who like skateboard/vintage/designer t-shirts, modern music label logos, video games and other modern styles. Poking around at the Threadless online clothing site will give you a good idea what to expect when it comes to graphics and imagery. Although not the emphasis of the book, there is also a good batch of classic corporate style logos. Many designs are graffiti influenced, however very few are full on 3d/thick style "tags."
People who won't like this book are those looking for logo ideas and reference for uninspired generic companies. If you consider all your clients boring, move right on by because "Grandma Sue's Fabric Store" type logos are not represented in Dos Logos.
As for the actual book itself, the hardcover is a nice unique canvas with stamped screenprint logo. I haven't had it for long, but the binding looks strong and artist names have a UV block coating as a small upgrade over Los Logos.
As for the main use of this book I see it as a great brainstorming tool. The vast variety in styles greatly helps promote mutation ideas and concepts. Although one might be able to use it as a "how to look a style" guide, I wouldn't recommend it. That is simply not the goal of Dos Logos hence why there isn't any commentary from the individual artists. I honestly can't think of any complaints, with 444 pages the price is very fair. As a modern designer myself, I highly recommend!