I finally purchase a Mobius from E-bay. Evidently one of the Kickstarter's decided they did not want their unit. I did not have any issues with hissing or a sound floor. Also, I was able, just recently to update the HQ and download the firmware without any issues. I now have the stereo mode and the headset works great. I really have not used it as Bluetooth, just USB while gaming and I am greatly impressed. I have not found it to hurt my ears, except when I first put it on, but the cups settle in very soon and I can wear it for long periods of time. It recognizes the Mobius correctly in the sound settings. I need to use it in Bluetooth and see how that goes and keep playing with the other settings but so far it is great. The only thing I experienced after the firmware was a message it may not be charging. However, I rebooted my computer with the Mobius unplugged and played Destiny 2 and never saw the message again, so at this point is seems to have cleared up. I have not tried the mic as yet either.
During the software download I made sure I had the cups laying flat and was careful not to tough the headset as per instructions. Again, the download worked very well and so far very stable.