It really is First Class
It's not that I particularly have anything against the X-Men, but their backstory is so huge and complicated that I can't imagine picking one up and having any clue who anybody is or what they are doing, even if it's explained. I read a lot of them when I was a much younger, but I have an idea that I wouldn't even recognise the characters I recognised. There is such a huge weight of continuity and I don't want to have to read a zillion other comics to make sense of the one in my hands, and that's before you add in all the recent "event" comics.
But I picked up X-Men: First Class #1 on a whim, and partly because it was free of all that continuity baggage. It's great. Sue Richards mentors a teenage Jean Grey, who is feeling a bit left out among her all-male team. Hilarity ensues.
I loved the story, I loved the subtle nuanced characterisation of everyone except the Mad Thinker, and I loved his unsubtle characterisation. I loved the art, which supported the characterisation so well. I loved that I could read a satisfying story in a single comic.
Come to think of it, the last Marvel comic I enjoyed was also written by Jeff Parker.