The rules are fairly simple, but I find they work pretty well. For a tenner, it's certainly worth a buy. It's definitely primarily intended to be "off-brand Star Wars", but you could do Rogue Trader, Star Trek or anything else pretty easily. It uses
D6. By design, it's for tabletop, but I suppose you could convert the ranges to counting squares and it't work fine.
The game we played was about half what the rules recommend as a normal game, and took us a little over an hour; that was with a couple of heroes and two or three goon squads on each side.
Everything is custom. There's a couple of sample warbands at the back of the book, but it was pretty easy to throw together stats for Stormtroopers, Darth Vader, Han and Luke.
There's some better information here:
http://dropshiphorizon.blogspot.com/search/label/Blasters%20and%20Bulkheads