Lavishly illustrated, this book provides valuable descriptions and diagrams for a variety of armors, weapons, and barding, as well as important items of clothing and equipment. This is the essential volume for the well-equipped Dungeons and Dragons character.
Not only will this book aid in setting up and playing your D&D game, it is also (in general) historically correct and just plain fun to read. It is a supplement that came out for 2nd edition and of all the older supplements it is the one that will be the easiest to adapt to other editions.
At the time I read this, I felt it was largely unnecessary. Since then, I have come to appreciate it more. Adding variety to the mudane items in D&D is helpful, and there are some nice descriptions of equipment, as well.
A handy book to read through when world building, usually gives me enough to start my google research. Sadly its rather limited to medieval europe, if you stray as far as the eurasian steppes or as far back as Rome and it has nothing for you.
If you are a Dungeon Master who runs AD&D 2e at your table, then this is a must read. Lots of good information that will add more details to your campaign world around Armor, Equipment for Mounts, Weapons, Equipment and Clothing. I highly recommend.
Some of the illustrations are nice, but for the most part this book doesn't offer a whole lot that would be necessary. Maybe if you were to implement armour damage and hit locations and other such things, but we always kept forgetting about everything except raw armour class.
This book was one of the bridges from D&D into historical information. From a gameplay perspective, this boon added relatively little—differing types of mundane equipment would be quickly eclipsed by magical items in many games—but it sparked my imagination when I was younger and it helped connect the worlds that we played in with the items in museums and history books.