First of all, I will be perfectly okay with this topic title getting replaced. I saw there wasn't one, and I figured that it would be needed. I'm not going to watch on account that I don't have subscription cable . . . but that didn't stop me from posting a similar thread when the Doom Patrol forum (now collapsed) came out.
I haven't read the books in years, but I know it's basically Garth Ennis doing what Garth Ennis does best . . . taking the absolute piss out of the superhero genre. He was able to do that back when he wrote Hitman for DC Comics, but he goes full-tilt with The Boys. Art is from co-creator Darick Robertson, who got his degree in comic satire from two notable books: Transmetropolitan (with Warren Ellis) and Happy! (a four-issue miniseries with Grant Morrison that wound up getting two seasons on SyFy).
I'm willing to bet there will be divergences from the source material, but I'm still recommending new viewers to read the books. Also, while I doubt the "Herogasm" arc will be filmed (basically, it's a week-long super-powered fuckfest), I will concede the series probably won't be bound by traditional standards and practices, which means The Boys might be more Garth than Happy! And considering what Happy! got away with, that might be something to see.