I actually have been. My reaction to it was similar to The Boys -- at first I thought "Okay a violent, edgy take on Superheroes, bla bla bla" ... I had started to read the comics but got kind of fatigued on comics in general and couldn't be bothered to catch up on all of it.
But while The Boys has been a little uneven for me (there's a lot of shock stuff that I get bored of sometimes) I feel like Invincible is better; it definitely retains a Saturday morning cartoon feel at times but I think that's by design? Anyway I've been following it and enjoy it.