We all can watch a serial killer show and not really care about neither the killer nor the victims because the odds of you ever having met one is very low.
But, most likely you've known someone suffering from cancer or some other painful disease. This is where the balance of the show might be hard to grasp for some.
As someone who thinks PETA is really messed up for killing over like 80% of their 'survivors' (look it up), people don't think too much about it. When it happens to be a human life it's entirely different. Maybe that cat they 'put under' isn't ready to go. But if a human being that wants to end it's own suffering from non-stop pain in a sound mind...it's not allowed in all but a few select places. This makes no sense to me, but that's another story.
Mary and her sidekick do just that, for a price. They are in some weird way 'killing people'. I'll never understand letting people suffer who really want to just die and stop it all is humane, but that is the nature of our modern world I suppose.
Anyway, this show seems very promising right away. Within 4 minutes I was emotionally effected as this is a very profound ordeal. So far the characters have been great, and I can't wait for more. Mary is not only an Angel of Death, but a very likable person. It's a bit too early to judge since I usually go by the 3-5 episode rule before really getting a grasp on a show, but after this pilot I am excited for more.
It might give people some heartache though. You will always want more time with your loved ones obviously, but maybe Mary could have made it easier for them and let THEM choose when they were ready to pass on to whatever lies beyond this planet.