I read your post and had no idea what a "Madrock Safeguard" was.....a quick Google search fixed that. After looking at the device and watching a few videos I am intrigued. So in a climber you take a length of static rope with you every time you hunt? Then attach it to the trunk above the stand with the Safeguard attached in the event of a fall......so you can do a controlled rappel down the tree?
Just this morning I did a pre-season practice run with my Cougar Claw climber, using a Qsafe, PMI teather and Black Diamond Bod RC harness.....my standard safety regimen. However if something totally unexpected happened and I was hanging, the self-rescue process would be greatly enhanced by a Safeguard device. The biggest hurdle I see is taking it with you every time and setting it up. Maybe the saddle folks are more cognizant of such, but climber folks are not so much. Never cared for the Wingman, but the Safeguard looks like a workable, functional system. On my fixed stands I use a lifeline once they are installed, so the Safeguard would simply attach to that same rope....I presume?