This one is a winner. As boxed sets go, TSR has really scored big time - every part of the Neutrally aligned planes is so well covered in this book, and experresd in such interesting detail, that you'll find yourself wondering how you got along without this box for so long.
The Blood War comes to life once again with the in-depth exploration of the Yugoloths and their part in that eternal struggle. Discussions on the nature of the Grey Waste, why the Yugoloths live in firey Gehenna, and the politics of the Titans and Gehreleths of Carceri are beautifully worked. And the bits on the Upper Planes? Masterful.
'Planes of Conflict' is a great boxed set. Well named, well written, and very well put together. With work like this, the Planes will remain a vibrant and exciting setting for years to come.