Not going to lie tried on a Vaughn and the mobility was awesome and almost swayed me in picking one up but like mentioned by Coop they are WAY overpriced for the level of protection they offer. I would suggest looking at a smaller company that will make just as good if not better gear for a lower price point. I picked up a Passau and it was cheaper than any off the shelf "pro" gear and is a tank.
As for masks There are other companies that offer arguably more protective masks for the same price if not cheaper. OTNY makes good masks, I have one of their higher end masks and have taken some good shots off the head and only heard a cracks but no ringing or headaches. I think my OTNY was around $730 with upgraded foams and PC cage.
Looking at the article seems like they are primarily using off the shelf masks which are going to cost more and offer less protection than smaller manufacturers. Hell you can get a full custom mask for cheaper than the $999 price tag.