I have the S1 since it's beginning and I am very happy with it. Also participated in all of their Beta testing for new fw releases and with the new features in 1.6 it's even better than before
(AutoMute etc..).
I have an "old" writeup at
http://www.janixworld.com/x5/StealthONE/
since the writeup I upgraded to v1.6 and also relocated the V1 the passenger side of the headliner console as it hides thew V1 even better.
- Jan