From what I've seen of it, I like it however at the same time, I wouldn't buy it for several reasons.
The type is SO large and the spacing is huge making the page count... well... not so grande. The paper used is also of low quality so the price-tag isn't really justified.
The content, much like the World Builder, is informative but very dry (although much less so than the World Builder) and lacks any 'crunchy' bits. Quite frankly, this would've been better off having been published as a GURPS sourcebook as I think they would've done a better job of editing and layout.
That said, all the above was only garnered from a flip-through at the LGS about three months ago so take it with a grain of salt.