Personal exprience.
Hubby worked as an assistant funeral director for a few years,he insisted he wanted "direct cremation",basically,from where he took his last breath to the crematory,no viewing,flowers,luncheon,at all.Told everyone these were his wishes,kids,friends,went and paid the funeral home.
He passed in 06,in the hospital,after a 3-week illness.I couldn't do it!!! I just felt we needed something to commemorate his life,our 2 sons and daughter felt what ever I wanted was fine,we had a short service at the funeral home and a few people back to the house after for lunch.I didn't have his ashes yet.
I do not regret my decision,I sometimes wish he had a headstone,so I could go and "chat" with him. I sprinkled the ashes over the property where we had lived when I moved.
It's a very difficult decision and hard to understand the mindset of the loved ones at the time of their family members passing.