BT Ironhorse sans useless bipod
BT Expansion chamber
Super Fly Bolt
Apex set on step 3
Weight, comfort, No-Fog, Ease of Assembly/Disassembly
Price; but you get what you pay for
Could possibly have some more ear protection
I have used these goggles for a little over 3 years now, and I am pretty happy with the results. They are incredibly easy to assemble and disassemble, thus it is also easy to give them a thorough and proper cleaning. Anyone too lazy to open them up and scratch the lenses can pay the price. One of the easiest I've ever dealt with.
The No-Fog on the lens is excellent. 98% of the time I never see even a spec of fog, I can breathe right on them and still get nothing. I've played on all types of days and rarely get fog. Recently I played on a 60 degree day with tons of humidity (fall season) and they fogged up after my 3rd game, and they kept fogging up thereafter. I refused to spray any no-fog on them because chemicals stay off of these lenses and i just had to disassemble and wipe dry. Despite the fogging, I still had the best view on the field. all other masks were doing a lot worse than mine, so I was still happy. 100% humidity and semi-cool weather will do that to you. Nothing is perfect.
Despite the very, very seldom fogging, they are worth the money. A great mask that will do you justice on the field.