Gotta call bs on you for that one Dave.

Sounds like a little FUD being spread. (Do you work for JRiver? I also own that, btw)
JPlay is intended for a dedicated audio PC, not to also run on a PC running other apps at the same time.
I have had no issues with it on any of 4 different PCs, Win 7, Win 8, and Server 2008R2.
Jplay has been very responsive to any questions I have asked them.
They offer a free trial - if you don't hear an improvement, don't buy it.
It made a definite improvement in 2 completely different systems for me. Originally with the John Kenny DAC and now with the Teac.
The issue with the Mapleshade cable was NOT Jplay. It also would not work between either of the computers I tried it with and a printer.
No sync.
I was pretty disappointed, as I genuinely like their speaker cables with my Scott 222c. Nice synergy, and before I had the Scott modded, they were the only cables I had that could fit the terminal plate on the Scott.
I will agree with you on the Furutech. I like them
a lot on your D1 interconnects.
What does their USB cable go for?