I have the book. I hope they make a software or database version. I consider it a replacement of the elements of the following products as they contain what made worldbuidling with following products so cool:
DGP's Worldbuilder's Handbook - Full details generation of all the elements of the UWP From Starport Details thru the full Tech Level Profile. The only elements missing are the Religion Profile and mapping the said UWP onto a map.
GURPS Traveller: First In - All those fun details about stars, more details on sizes, atmospheres, densities, habitibility
GURPS Traveller: Far Trader - World Trade Numbers, GDP, Expected Starship Volumes/Visits
Traveller 5: Importance, Resource Units, Cultural Profile (HASS)
PLUS "weird stuff" - expanding the eHex Codes for rosettes, ringworlds, dysons and such , odd star phenomenom like brown bwarfs black holes protostar clusters and planet generation in such conditions, military budgets, expected local armed force sizes and best of all (for me) balkanized world faction/nation generation.
In some cases you will see familiar formulas from those other books.... and some guidelines on how to convert back and forth between it and Traveller 5 so you can covert from travellermap.com. Useful since Imperial Sectors are canon, but in T5 format...