never used them myself (as yet i should say ) i dont think you have to blend them, other than on the side walls, as most use them so there is a perfect smile...this is what i thought anyway....feel free to correct me if wrong.:hug:
i'm trying not to use them as i think if it is too easy then i will end up using them all the time rather than mastering white liquid and powder.
however....I am sure that a reputable brand such as creative would not class using them as cheating, otherwise they would not produce them......its just another way....just like the poppits are another way of applying liquid and powder.

