I really liked it. The voice acting was absolutely top-notch, JK Simmons is great. But the thing that really grabbed my attention was how it uses violence. Reposting what I said here the other day:

My favorite part is that I find that it’s one of the best uses of gore in anything I’ve ever seen. I remember feeling like the first episode was kinda lukewarm and just vaguely interesting, until the last scene. The whole episode is [...] kind of Scooby Doo-ish, just your typical tepid animated X-Men violence, no blood, low stakes, nobody’s really going to die unless it’s a very special episode.

Then Omni-Man arrives and slaughters everyone in excruciating detail, and the show just kind of grabs your attention. This happens very often in later episodes, and the result is that the more extreme violence has a very strong "shit just got real" feel. Whenever blood starts spraying all over the place, you start paying very close attention, because you know that it’s no longer just a superhero sparring match, but true violence. Contrast this with The Boys, which, while certainly a very good show, has the violence turned up to 100% from the very beginning, which kind of dampens the effect in a way.

I don’t really know how to explain it in more accurate terms, but I find that the violence in Invincible is simply much more impactful than in most other stuff I watch.