I never used it - but it definitely looks like a wonderful film.
There's time yet. Just one roll and you're part of photographic history.
For me it goes way beyond wonderful - words like 'unique' and 'iconic' are overused, but they really apply to this film. It is saturated, but not overly so, with a distinctive colour palette. Skin tones are accurate (European ones definitely, others I can't say from personal experience but they seem to be). Just enough grain. Contrasty, too much sometimes, you need to expose carefully, but it's easier than Velvia. I think it looks like reality, or reality looks like Kodachrome.
And as if that weren't enough, in dark storage the slides don't fade for decades, like
this from my collection, taken in 1961 or
this from 1963 (both are a little soft from scanning, the actual slides are very sharp). Just think, $11 for the film, $6.99 for the processing, $4.00 for shipping and you can have 36 or 37 fantastic images that you can guarantee will look just as good in 2059 (and very likely 2109) and all you have to do is keep them in a shoe box under the bed.
Kodak should have employed me in sales...
Kevin