We recently started watching Agents of Shield. I'm not sure how I missed this (7 seasons?!) the 1st time around... but it is well done. It's like a combination of Marvel and 24 in many respects. The story of Agent Coulson is pretty awesome... and at this point, I think it's say to assume spoilers are ok.
We are about ready to turn to season 2... and the show so far has been great. They need to figure out a way to resurrect this show. Make a deal Disney... get it done. Don't be stupid.
Last... I am also confused whether Agents of Shield are considered canon or not. There's TONS of material and major tie-ins to the movies that ... would only make sense that the show would be canon. Like Agent Carter, there seems to be more confusion and statements on whether both are canon or not.