High Maintenance Trait

I've been playing a Sim with the trait for several in-game weeks and I really enjoy it. Ellen is an actress and celebrity, so I just thought it would fit her well. As long as you pay attention to the Sim, you can always counteract the bad moodlets with a relaxing activity and they can go about their day again. With one exception: Ellen had progressed in her career far enough to select a gig where she had to research the 'Angry' emotion. So I selected her and clicked on research emotion. She got the 'Angry' moodlet which was fine. I usually use a big stuffed animal to then perform the interactions associated with the angry emotion, I've done this with many other Sims before without issue. In this case - and I'm pretty sure because of the High Maintenance trait - after a few angry interactions I got the notification that she was dying of Cardiac Explosion. I would have let her die, but I wanted her to have a child with her husband so I exited without saving. And I'm glad I did because that kid turned out to be one of the cutest toddlers ever born in my game. But I think down the line I will have Ellen do it again and continue the game whether she dies or not.
Anyway, that's what I've experienced so far and I'm interested to try the trait on other Sims and under different circumstances. It is a great addition!