I have them. Tried back 30 years ago to run Stalking the Night Fantastic. We had fun. Particularly when they encountered stereo types, twins visually but only one person. (Was likely a typo but I liked the idea so I went with it.) But it didn't take as far as long term play.
That hasn't kept me from mining for ideas from the Tri-Tac games. Took Incursion into West End's D6 which worked well. Hoping we can get back to it soon.
I picked up the combined PDF relatively recently. The setting definitely has its points of interest and mechanics look as if they'd run better than some much later offerings.
FTL:2448 is product of its times ('80s). Genius ideas, scanty in some details (a good thing) to inspire imagination, sometimes overly complex and sometimes bad production values. From a Hard Science standpoint, all the different methods of FTL travel seemed silly, but it was fine for flexible space opera/fantasy. Still it is from one of favorite game companies, Tri Tac Games. I picked it up because it was from the same company that made Fringeworthy, which I like even more. I am sad that Richard Tucholka died and never produced a d20 Modern version of it as he did with Bureau 13 and Fringeworthy or a Traveller version. But now with the new MgT2 books (High Guard and World Builder's Handbook) HMMM.. And of course he made the first K'Kree oriented skirmish game. Where do you think I got "My Little Ponies of Death from? 1248 Books?