Squadron Supreme: Read the entire series and such.
Good: It was an actual respectable take on the Justice League by competitors. It didn't try to take any cheap jabs that were mean spirited (They called Hyperion "Super-man" once, but that was just a cute "c wut i did thar" moment), and more came off as Marvel trying to use someone else's characters in their own way, though, still technically original characters thus they could do whatever they want with them without people calling "foul" since no continuity and all that.
The basic premise was neat and pulled off decently too, and it's interesting how the story could see so bubbly and colorful for 90%, then the last few pages take an extremely dark turn that makes you feel uncomfortable, yet doesn't feel out of place. Series ended on a lighter note than I expected, though still generally a dark one, as given all the talk about it I was seriously expecting Arcanna to have a miscarriage given she was doing exactly what she said she shouldn't do. but in contrast, it did work as a "but it's not all bad!" point to end with.
The Bad: I guess just the series shows it's age in the sense of it's writing. It's very...80s. The narrative is hard to read without the deep, over-dramatic exposition voice in your head (DAMN YOU LINKARA!), the characters have to think out every action, so there's a lot more "Tell" than "Show" at times. There are definite times where I feel they are saying "5 words when 2 will suffice" (yes, I know the irony of that coming from me), you get the jist. I feel like the series deserves some sort of updated Re-imagining as a result.
Also, seriously, POWER PRINCESS? That was the best name you could come up with the Wonder Woman proxy? The others aren't too bad; I guess the only other questionable one is the Whizzer (Flash proxy), but whatever. Others all worked, but man, Power Princess just stands out as a huge case of "THIS IS THE 80s!!!" if you ask me.
It was a decent read, though because of the bad, sometimes it was a bit of a chore.