Zsweet....???

I am intrigued by this sweetener called Zsweet - though it is outrageously expensive - there are no cals, no carbs, nothing in it..i guess it is made of sugar alcohols from fermentation of fruit, etc...the website claims it is all natural and tastes just like sugar...

Has anyone used it, tried it, anything? I am looking for some opinions and so on regarding this stuff! Thanks in advance!