George (ptgreek) speaks the truth, and I know this because he gave me his Grusd mask to see if I could figure out a more efficient way to make the jaw system work. First off, the fiberglass frame he uses to fit the head could potentially put an eye out with all the fiberglass shards pointing off of it. Seriously, if you put that thing on right out of the box without looking at if first, you could actually take an eye out. The jaw system, while good in theory, is so stiff that you'd have TMJ after a few times of trying to use it. There may be some hope for the overall design, but it needs to be seriously re-tooled, and I'll be starting with a new frame, maybe going with a semi-rigid resin like Task 14 for a more comfortable (and safer) frame. Now, maybe it's possible that the mask George got just happened to have a VERY "stiff" jaw mechanism in it... Maybe they're not ALL like that... But, you can barely move it using both hands with strong force, and you want to put that kind of pressure on your jaw?... And if they're all like that, I can't believe anyone would claim that it actually works.
But the thing that really blows me away is the poor quality of the mask overall. Even if the jaw system worked flawlessly (and it barely works AT ALL), the mask itself is beyond sub-par at ANY price. The sculpt is small to begin with, there are really no dread holes to speak of, the molding job was horrendous and the casting is so thin you can just about see through it in places. Now, yes, I realise for a functional working mandible system, you don't want a super thick casting, but to be honest, I don't even know how he gets castings that thin. Maybe it's the latex available overseas, but even if I do an uber thin casting with a quick dwell and dump, mine will still come out at least twice as thick and would still be plenty flexible enough to accommodate enough movement for a system like that. The only thing I can figure is that he does a couple brush in layers and leave it at that.
I'm generally not one to slam someones work, but I can tell you in all seriousness, if you take a look around these forums, you'll find MANY examples of first time sculptors who do FAR superior masks. In my opinion, for the few hours that you'll actually have the suit on, you'll impress FAR more people with a great looking mask (for the same amount of money or less) than you will with a crappy mask with a shoddy jaw system that works sub-par at best... so, as stated above, enter at your own risk.