Good first chapter, with probably the most interesting setting of a Nanoha installment to date, and also very good art.
Seems like they're definitely following the movies' continuity and diverging from the original timeline, which is fine, and it's nice to see Nanoha and Hayate back again, but I hope they address why Hayate looks much older, and it's not a Chrono-type shenanigan again.
Also, it's just one chapter, but I already miss Fate. I hope she joins the case soon and our favorite magical girl couple gets to spend a lot of time together.