I tried on the prototypes, they're completely different to any mask i've tried before.
As you may know, most masks will rest on your nose, which i find a bit uncomfortable as mine is on the larger side

The eyes on the other hand, rest on your cheeks - which feels weird to start with but is a lot more comfortable in my opinion. The only problem is they have a large profile and are very hard, so they're not as subtle as a pair of i4s, and are a lot more prone to balls breaking, instead of bounces and like a proflex.
From experience of my masks, the Empire E-vents were tighter on the nose, and got fairly uncomfortable after time, however were quite flexible, so there were more bounces.
The i4s are lower profile and a great field of view however, be prepared to be hit in the jaw sometimes if you happen to be calling positions. They're also fairly hard, so lots of breaks.
I've recently got a pair of JT proflex's, but i've only used them for one training session, so can't really comment on them just yet but i know i ate a lot of paint that day
At the end of the day, each mask suits a different person, its just finding one you think feels right. But you can't really ask for a review for something which hasn't come out yet
