I've tried using bio oil for several months on existing stretch marks and scars. I didn't see any noticeable improvements in the marks and scars , though my skin was lovely and soft where I had been using it. I had also put the product into a squirt spray bottle to make it less messy to apply. Given the cost I was loathe to have any spill during application.
I stopped using the product on my scars and marks as it wasn't working on me.
it smells nice but i stopped use after applying it daily for a while and i didnt see it helping with my stretch marks