Glitches brings us back to the moment when Cinder meets her new adoptive family.
The little winks
to [b:Cinder|11235712|Cinder (The Lunar Chronicles, #1)|Marissa Meyer|https://d.gr-assets.com/books/1388186881s/11235712.jpg|15545385] are quite fun: Cinder discovering her little orange light and wondering what it might mean, Peony talking about her future husband
It doesn't really bring any new information concerning the characters or plot. The secondary characters we know keep being as unidimensional as in Cinder and the one interesting character who's new (Garran) doesn't get any development.
But we have Iko and a sakura tree, which is nice!