If you like Planescape, you owe it to yourself to check this out. This is a great setting for multi-dimensional goodness and fun with almost ludicrous attention to detail. The art is great, the layout is professional, and it's just plain fun to read.

Oathbound Seven is a new take on Pathfinder gaming that allows any Pathfinder character to be imported relatively easily (and without the general gripes I have in such settings, since the process makes sense, and seems to show good amounts of thought).

Stylistically, I'd describe it as the SLA Industries of fantasy gaming, only less (to some degree) depressing. I enjoyed reading it a lot, and it has rich flavor text backed up by (somewhat overpowered) mechanics, however, with the setting, insanely overpowered heroes make sense (after all, the setting is basically a breeding ground for insanely overpowered heroes) without posing the immortal question of how every town is in trouble when adventurers are super-powerful and none of the monsters are a threat to them, because the heroes are literally super powerful, as is everything in the world.

It has a unique system, and it's a lot of content (including decent, sometimes superb art), and its price is certainly very decent for the amount of content that is presented in it, so I'd recommend Oathbound Seven to anyone running Pathfinder who wants a little excitement in their game.

In addition to the content of this book, I would like to point out that it is also beautiful. Well written, high quality product all the way around.