Oh man, that's rough shit. Having your mother die is bad enough, but for her to go that way just isn't fair.
The man deserves the sentence, definitely. He had so many chances to just leave her alone, but he chose to ignore them.
I'd be happy about the verdict, and I wouldn't try to hide it. Maybe I'm a little vindictive, but if a man stalked and killed my mother, I'd pay thousands of dollars to be left alone with a lead pipe in a room with him for 5 minutes. Of course, since that's not going to happen, the best I could hope for would be a lengthy jail sentence.