The issue opens with a look into the past, bringing readers up to speed (at least somewhat) with Black Bolt and the Inhumans and the future they helped save from the clutches of the council of Reeds. If you are unfamiliar with the story behind Black Bolt and the Inhumans, where and who they are and why they are returning "home," then you may not initially understand what is happening at the start of this issue. It is, however, interesting; and while it may not be a good jumping on point for new readers in the sense that it plays with a lot of concepts already deeply embedded in continuity; it's a good place to start reading because it is the start of a new story arc.
The art by Nick Dragotta and Chris Sotomayor is really, really pretty. I've been a big fan of their work on FF and think they capture the outer space element really well. Their ability to convey emotions through the expressions of these characters is fantastic.
I think Hickman provides a really great balance between the light-hearted fun (that panel with the "yellow love slug" is adorable) and humor with a lot of heavy plot development (a lot of the Inhumans and Black Bolt stuff isn't easy to take in if you're unfamiliar). The scene in the car where a young Franklin Richards is speaking to his future self is great too, and the dynamic between them is just really very sweet. That's probably the best scene in the issue.
There wasn't really anything bad about this issue, in my opinion.
I think this is a great set-up issue. It really does a great job setting up this story that brings back some pretty cool (and very powerful) characters to the series, but also maintains a balance between a heavy plot and some lighthearted, funny dialogue. Lots of moments where you will find yourself chuckling when reading this issue, so be sure to expect that. I really enjoyed the art and the story in this issue and I am definitely interested in seeing how Black Bolt and the Inhumans come into play in the future of this series.