There were few utterly reliable slide films back in the 1970's and early 80's when I was shooting film in the greatest quantity. However, despite a slightly blue-ish tink on skin and pinks and reds that went a tad "blousy" in sunshine, K64 was as good as it got, in my opinion.
I even had a wedding couple (the groom was a fellow photographer) that insisted I shoot their formal album shots on K64 - and then have the prints processed as Cibachromes. This was not the wisest choice due the very high contrast of the Cibachrome process making it difficult to keep detail in the bride's dress without giving the groom one hell of a suntan.
I haven't shot Kodakchrome for years. Nevertheless, I will still miss it.