When the Infinity Gauntlet saga originally happened, I was in my comic collecting prime. I missed out on most the saga, sadly, because I was in an area where it was quite hard to get a good selection of comics. I bought a few tie-in issues from other series and sort of pieced together what was going on. The only thing I remember is knowing the Infinity Gauntlet was coming in advance, because an issue of Quasar (my favorite comic at the time. Please don't laugh at me about that.) showed Thanos with the Gauntlet, as he attempted (unsuccesfully) to destroy a super-powerful villian you've never heard of called Maelstrom. (If you care at all, the Quasar series was called Cosmos in Collision and ended with the universe nearly being destroyed. I really wish they'd reprint that one as well, but Quasar has never been, and likely never will be, popular enough to warrant something like that.)
This collection, though, is great. All of the original issues of Infinity Gauntlet in one. All the "intergalactic biggies" are there like Uatu (The Watcher), Galactus, Eternity, Death, Living Tribunal and a few more. (Noticeably absent are Infinity and Oblivion.)
I particularly enjoyed the scene where all the galactic biggies ganged up on Thanos and started beating him senseless. Or they tried to, anyway.
As far as I know, this is one of Marvel's earliest multi-comic title sagas. (Secret Wars came before it, though. And DC also had done Crisis on Infinite Earths in 1985.) Whereas Secret Wars was kind of disappointing, Infinity Gauntlet showed how it should be done. Not bloated and taking well over a year to play out (as CoIE did) and not having a misuse of a good idea (as Secret Wars did), Infinity Gauntlet was nearly as perfect as a concept like this can be.
So, now all I'm waiting for is a graphic novel of it's followup story (happening a few years later on), Infinity Crisis. (Not nearly as good, but gives a certain closure and definitely ends the chance of anymore Infinity storylines. Well, as definite as you can get in the Marvelverse, anyway.)