As a Dad, this along with anything dealing with SIDs always gets me, luckily our daughter has grown to a great kid, but SIDs were always playing on our mind.
I enjoyed McCarthy's performance as the still not allowed to grieve mom, she did it well. O'Dowd, I enjoyed him in other things, was okay. His American accent was not great, still got the feels from it. Kline was good for his part.
The stinker here was the CG starling, that was horrible.
Still, the movie was moving and was glad to watch it. Might not be a rewatch though.