JAVA Raven, Proto Switch EL, and a few Scott masks back in the day.
Reverted to using pumps. Makes the game more challenging.
No normal fogging
Good field of vision
Plastic might be too soft
Price may be an issue if you're cheap
I bought this mask new (actually I special ordered it,) and I can only describe it as nothing short of excellent.
The first game I played with it was on the hottest day of August in a gravel pit with some local guys. Humid, muggy day, 97 degrees in the shade. Problem was that I was standing in the sun, mostly. Luckily the mask was well prepared for this; the stock lens was tinted like sunglasses, so all the sun didn't hinder my game. (Sunburns are a different issue...) Under these circumstances it didn't fog. I was running a whole lot the second round, sweat running all down my forehead, the foam became damp... and it still didn't fog. By this time I am won over, and it was totally worth the $90.
The only time it ever actually fogged was when I played during the first cold snap this fall, and even then it wasn't much, and I was really pushing it. I don't know what Empire did to these lenses, but they rock.
Another thing that impressed me was the fact that the mask came with two lenses (one preinstalled and tinted), a carrying bag for lenses, and a bag for the mask. Very nice.
Replacing/changing the lenses in easy. If you are familiar with newer mask configurations it works the same way, basically.
There was one thing I discovered when using it that may be an advantage to some, and a disadvantage to others: The plastic on the face is very soft. I guess it's designed to make paint bounce. For this purpose I've found it useful, but then again, if you are struck from ten feet away (should you choose not to give up,) it will hurt if the circumstances are right.
The soft plastic combined with the light weight of the mask create a fine balance. I have never had it fall off or slip in the time I've used it.
Overall, a very good mask.
If this were broken or stolen, I would be quick to buy another. I am personally very happy with it, and highly recommend it. If you need a mask and have the money, or if your old mask isn't cutting it anymore, give it a go. If you're frugal, try this when you finally splurge. I think it's a good investment.