I spent a few hours in co-op this morning on the PS4 - my first time trying the console version. It's not as pretty as on PC and the interface is clunkier, but it still works really well and is VERY pick up and play/noob friendly.
Specifically, I was playing with my kindergartener, who had no difficulty with it.

I handled the inventory/skills management stuff for him and basically had him follow me and help kill demons, and we both had a blast
