I only discovered the Machineart hand guards a few weeks ago. I was going to fit TT or Wunderlich extenders, but Machineart looked so well made, and gave 3 protection settings, that I decided Machineart were the way to go.
Fabulous bit of kit, and they show how little protection from the elements the OE guards gave me. They cut out that blast over the top of my hands, and seem to protect me even up my wrists. Even with the heated grips on, the blast over the top of my hands with the OE guards sucked the heat away.
Needless to say, the engineering is top class, and they actually look really well on the bike.
The ability to swop quickly between the different levels of protection is something I had not come across before.
I reckon they will delay the point where the heated grips go on.
It's early days, but these get my vote
I bought a pair of Wunderlich extenders back at the start of Dec, about a week or two before the Advanced Guards appeared on NNs (least, it seemed to me). I have wrestled over the last 2-3 months with having made the investment in the extenders rather than the guards, but simply had to pull the trigger last week.
Machineart stuff has always been quality and well designed but basic in form and finish - mudsling, avant guard, x-heads. However, with the Advanced Guards, Andrew has moved machineart up a notch. Great design, a 'wow' quality finish on the exoskeleton and brackets. Makes bark busters look like something knocked up at the back of a shed.
I were to critique, there's probably room for improvement in the grey inserts: I not sure the material really works and I think there's something not quite 100% with the moulding along the bottom of the inserts. And the honeycomb back gives an unfinished appearance with the 'winter shield' removed. Also, the guards rub the windshield knob slightly if you're doing an off bike manoeuvre.
But still, these are going to fly off the shelves.
Confirmation bias is a funny old thing. When I fitted the Wunderlich extenders, at first I thought, ooh, they look a bit big. Then I thought, nah, the make the GS look quite Adventure-ish, look good, like them.
When I put the Advanced Guards on, I actually appreciated the look of the Wunderlich extenders, until I got into the sporty

GS mentality - then everything clicked into place.
PS. I also retained my evotech weights, retained the bar end screws supplied with the evotechs and used the end caps supplied with the advanced guard, no problems.