To see the hidden spoilers: click your left mouse key & drag over the spoiler part - you are highlighting it & it should show up.
We saw it yesterday: my sons are 5 & 8. Very touching in some parts and that made me & DH cry. It's just life I guess (spoiler: couldn't have children, loss of a spouse). I think it touched DH & I on a relationship level, KWIM? My older son realized what happened to Ellie and just said, "oh, ok", but it went over DS5's head.
I didn't realize it was PG; there were chase scenes, but my kids were ok with it. We all loved it. We saw it in 3D, but I would skip that - not worth it.