This is a well produced and interesting setting. It covers an outer system including a gas giant, several small planetoids and both trailing and leading trojan asteroid clusters. Each of these has its own culture, and complex links to the other locations.
The idea here is that the inner system can exist in line with your canon or canon-esque universe, with this outer system surrounding it. It does put some pressures on which canon world you choose, but this is easy to work with. I always strive for intra-system variety and the idea that there are complex populated environments which are otherwise undocumented is quite interesting to me. The premise is that the "normal guidebooks" and standard trade for a system don't bother with the outer system.
What this does NOT include is any kind of plot, plot hooks or timeline. That is, it is not an adventure module. For me, this is fine since I like to come up with my own story, but if you require this level of guidance, you might be best served elsewhere. There are a lot of kernels to work with though, in the style of "There's a settlement of folks that live down in the valley. They come up to trade but not much else. no one is really sure when they got here or why, but the rumor is..." (apologies to the writers for my paraphrasing)
This is a rich setting and feels very much alive. It immediately gave me new ideas for my ongoing campaign, and I feel that I will be able to insert this into an existing system as designed. My only worry is that this will now be the most interesting place in my campaign, and I have to find a way to keep the players there long enough to notice!
The list price seems a bit high for only 21 pages, even though they are dense.
I'd have liked to have a detailed system map.
[5 of 5 Stars!]