Well I have to say most if the stuff I've read about this is positive. I always used Olive oil but now we find this is tastier and seems to have many benefits benefits. See below.

What are the health benefits of Rapeseed Oil?
Contains the lowest saturated fat content of any oil - less than half that of Olive Oil.
Has 10 times more Omega 3 than Olive Oil.
It is a good source of Vitamin E.
High in monounsaturated fats.
Contains no artificial preservatives and is trans-fat and GM free.
It is suitable for a variety of diets – vegetarian, gluten-free, Kosher and Halal.
It is safe to cook at high temperatures with a burning point of 230c much higher than Olive Oil.