What are everyone's thoughts on the indexes thus far?

I mainly play Necrons, and I'm quite happy with them. Especially the new Reanimation Protocols, since i had the worst luck with 9ths version

I have a DG boarding patrol, and I'm hella bummed about how they're shaping up.

I have some Ultramarines, but don't really know how to play them; and some Guard, and while they look need, i can't think up a color scheme i like, so they're collecting dust :(.