I am a huge fan of bio oil. I have used it on stretch marks, dry end of the nose from having a cold and blowing my nose a lot, as a cuticle oil, a hair treatment and an after shower moisturiser.
What I love about this product is that the amount of things that you can use it for. I like that it comes in a variety of different sizes and that the bottle has an attachment inside the opening so that you can control how much comes out at a time.
Although my stretch marks did not miraculously disappear I did find that the appearance of them was reduced a lot from using this over a six month period of time. I also found that my cuticles were a lot softer from use and that my hair was a lot shinier. I used this is my hair as a serum to control it after styling by just applying a few drops to my hands and smoothing through my hair.
I have purchased this once and been given it as a gift the second time. Originally I bought it to help with scars from major surgeries, which i never really notices any difference with. although it felt nice rubbing it on.
I was given it while pregnant with my son, to help with stretch marks. My skin marks extremely easily and I scar a lot. Unfortunately it didn't seem to do much with those either, but it definitely felt nice on my poor tight belly. The smell was fine, and I have extremely sensitive skin and I never had a single reaction to it at all.
Tips: If like me, it doesn't do anything for your scars etc, I have found it works great as a massage oil.