To the best of my knowledge, it has not been used on isosafrole, but I have seen it used on other styrene derivatives.
When a chiral epoxide is not the desired target compound, there is no need to use any elaborate ketone, acetone works well in most instances. However, it is not perfectly stable to oxone, and will undergo Bayer-Williger oxidation to form methyl acetate.
1,1,1-trifluoroacetone and even better 1,1,1,3,3,3-hexafluoroacetone is stable, and also more effective than standard acetone, but its higher price does not warrant its use for our purposes, unless it is carefully recycled etc, but I'd say that is too much of a hassle.