Seems to be a love-hate relationship with mostly full time pro cutters. It's going to be used by more saw makers, and is now required by some logging companies because of performance & safety.
Cutter chassis, rivet hole location, and depth guage were material design changes, benefiting in reduce vibrations up to 30%, and reductions in kickback energy, and possibly frequency.
Even Stihl has now intro'd a partly copied version.
Biggest complaint was that it "feels slow". When asked to describe what does "feel slow" mean, the most common replies were..."doesn't bite, doesn't feel like it's pulling, not grabby".
When explaining how both the cutter chassis/rivet holes, and depth guage were different, most seemed still to again...."feel"....they didn't like it.
When looking at many users chains they were either filing with too sharp of a Top Plate Angle (pointed), and or had too much of a Side Plate Angle (hook).
An Oregons test chart I have shows Vangard is at least equal is speed to LG in all cutting, with the exception of buried boring where it averaged 5% slower, and takes a little more feed pressure.
Hard to notice in vertial cuts, but more evident in horizontal cuts like flushing, notching, or dish cutting.
So, if it took 60 seconds to make a buried bore cut with LG, and it took about 3 seconds more to use Vangard, but vibrations were reduced up to 30%, and the additional safety from reduced kickback frequency AND energy were huge gains....it makes sense to use it as much as possible especially in hard woods, and cold weather.
Due to the depth guage, proper attention to it is more important than before....but because it's a key componet working with the new cutter chassis...it has to be taken better care of than previous designs. Kinda like buying high performance tires and not taking care of cold tire air pressure.
Years ago at a school with Walt Galer he stated that in the commercial market bar & chain wearout is 50% more just because of lack of proper attention to depth guages.
It almost doubles (90%) in the consumer market!