I have not read the whole thread but I will give you my story.
When I was 15 my mom and 6 yr old sister were killed in a car accident. Neither were wearing their seatbelts. My sis was thrown through the windshield and on to thw road but amazingly enough only had a small cut above her eyebrow. My mother however was nearly decapitated and her lips had to be sown back on. My grandmother decided in spite of all this that we should have an open casket funeral

To make matters worse me and my 13 yr old sis did not want to see them but we were pretty much forced to by family who thought we would never have closure if we didnt. Now my sis just looked like she was asleep but my mom looked horrific. something out of a horror movie. It took me years to get that image out of my head and now I wonder why in the world would anyone choose to do this.
I can see doing this if the person looks okay though.