Nice video, great work!
The compander explanation makes a lot of sense for the loss of signal. Other than that I'd say the device is damn good although I did have a few loud stabs of static interference yesterday while playing at a very close range at a backyard kids party, which suprised me as I've taken the WS-70 on a trip and walked from one hotel room to another still getting signal.
What would really be cool is if they were to release a firmware update to address the signal loss/compander issue but judging from the way their customer service representatives act, I doubt it!