Fred,
I have used the Mystery Antenna for the past three years or so and 
have been pretty pleased with it.  The twenty meter performance is 
better than the G5RV I used to have, but the new installation is 
better as well, so the comparison may not be valid.  It works well of 
forty and reasonably well on seventy-five.  Above twenty it does well 
although I've not used it a lot on the higher bands, although ten 
works quite well.
All in all I believe you would be pleased.  The antenna is at about 
thirty-five feet, quite straight, and there is perhaps fifty feet of 
coax after the twin lead.
Hope this helps.
Pat, K9JAUAt 07:34 AM 1/11/2013, you wrote:
>Have any of you guys used the mystery antenna?  It is simular to the G5RV
>antenna but supposedly much better.  It would be nice to have a single
>antenna that covers 10 thru 80 meters.  I have tried the G5RV antenna and I
>do not want to try it again as I could never get the SWR down to an
>acceptable level.  I am thinking of redoing some of my antennas including
>moving a small Roan tower but I would like to check things out first to see
>if I am really interested in doing it as it will require a lot of help.
>
>Thanks much,
>
>FRED C. ADAMS W4HC