If you're the sort of GM who likes and uses random lists and tables in your games, and if you're running SciFi, then this product is a treasure trove. Holy crap, you get a ton of stuff for your money! Nearly 90 different list/tables of various sizes covering a wide array of subjects. When you consider that your typical random table PDF product sells for between 50c and $1 for a typical d66 table, that represents tremendous value. Some are going to be more useful than others depending on the specifics of the game you're running, but I think there's enough in here for most GM's to get their money's worth.
Personally I would have liked to see the lists laid out more like traditional tables, with the dice roll numbers first. but since I'm likely to be importing these and using them in Inspiration Pad Pro, it's not a dealbreaker for me.
Of particular note are the planetary generation tables, which cover all the usual details, including a D100 list of Planetary Options that looks like an excellent supplement to the World Tags in Stars Without Number.
If you're the sort of GM who prefers to carefully plan out every detail of the worlds your PCs visit, you might still find looking over these lists useful as inspiration, but if you're a seat-of-the-pants improvising GM running a sandbox like SWN or running a solo game, then adding this to your toolbox is a no-brainer.
[5 of 5 Stars!]