The demos sound great, and far more realistic, flexible (in terms of mixing with other elements) and organic than anything various competitors have come upo with so far regarding FX Strings.
I was all set to buy it tonight (I didn't even know about it yet, but found it by accident while checking to make sure I am up-to-date on everything after upgrading to the full CFX package today), but ran into the same confusion regarding mismatched terms on the product page for FX Strings.
As I bought the Synchron Package for a slight additional discount on the Stdnard Edition of CFX earlier, I was surprised when it only showed up at the Promotional Price vs. also showing "Your Price" (accounting for what I own), so I figured that even though FX Strings is listed below Synchron Package, that it isn't included (yet).
From what I am reading here, my guess is that the promotional and loyalty prices are all correct at this poinbt, and that iot is safe to buy, but that there is simply some inconsistency in presentation of the terminology, that should be worked out to remove ambiguity.
I too am wondering whether the older Synchron libraries will load into the new Synchron Player (which does not yet show up in my account -- perhaps I have to first bu FX Strings for that to happen).
Given that the release date was apparently today, I guess we need to be patient for the website to stabilize a bit regarding product information.