Excellent face pro for airsoft. The soft lower portion allows ads with many guns, anything with M4 height iron sights. Just make sure the mask is snug to your face and as close to your cheek as possible. It does slightly inhibit breathing, but only slightly, and it might be because i have asthma lol. Uber comfortable, my bro wears glasses and the mask fits nicely over them, but he still prefers wearing contacts. The velvet lining around the goggles is supreme, but the foam on mine was peeling off, easily remedied with some regluing. The double-strap design is functional, but I wear a backwards cap so it doesn't really affect me. Field of view is pretty good, still is slightly limited (it's a mask), but peripherals are maintained. Fogging is nearly is negligible, I have ran around with this and no fog has reared it's ugly head. There IS a place where a BB could penetrate, on the bottom of the centre vent right below the nose, but it would have to be a perfect shot, and that spot can be protected with some sort of face wrap, which you should already be wearing for protecting your neck. FYI, the Dye I4 has multiple places where a BB could penetrate. I highly recommend this mask, don't let the price keep you from purchasing this. You only have one pair of eyes and one set of (adult) teeth (unless u want to spend thousands on replacing chipped ones from bb impacts.
easy to ADS on certain rifles (i havent tested ALL types of airsoft guns)
retention -- it's not going anywhere once adjusted
little to no fogging
glasses fit (during my experience. I haven't tested ALL styles of glasses frames)
It's eye/face pro.
BB can penetrate in one specific area on the mask (it is a paintball mask)
slightly inhibits breathing/communication
slightly limits peripheral vision