@burcidi-- I have read mixed reviews too and I have been looking it up for a surgery scar that I have, not acne scars. They might be similar though.
I think most of the reviews I read say that Vitamin E oil helps with scars. A few said that it irritated their skin but I think that these are the exception. Some people have very sensitive skin so maybe the vitamin E oil irritated them.
I don't have very sensitive skin, so I decided to try it. I got a tiny bottle of it from the pharmacy and have applied it on my scar. I don't know how long I should use it, maybe long enough for the scar to disappear. I'm just applying it once a day.
If you also don't have very sensitive irritant skin, I think it will work for you too. I guess it's just a risk that you might have to take. You can test it on your arm by applying a little bit and leaving it overnight. If it looks red or irritated, don't use it for your acne scars.
Some people use something called bio oil for scars but that has many other ingredients in it, some of them are not natural. The good thing about Vitamin E oil is that it is all natural.
I recommend getting the liquid vitamin E oil in bottles. A friend of mine said she bought vitamin E capsules and tore it to remove the oil. I have no idea why she took the trouble when it's available in liquid form.