M-2 antennas

[Phil Duff]

Saw the reference to the M-2 beams at W6QHS's QTH in Trey's WPX rundown and am
curious if anyone has any comments on the performance and mechanical construction
of these beams?  I stopped at the M-2 booth in Dayton a couple of times and
looked at their display.  The mechanical construction looked very nice.  How	
do they play in the real world, design background, etc.?