I was at Haigh Quarry July 16, 2017.
They were having a demo of OTS Spectrum and OTS Guardian. My Buddy and I dived both, I dived the spectrum twice as the first time I had it too tight (was used to ISI SCBA) it hurt my forehead the dive was great. So I waited 1/2 hr. And dove the spectrum again this time putting it on just snug. We stayed at 30' or less the comfort was great, I tried my best to get it to leak and did not leak a drop. We put a good hour on the spectrum was very comfortable best part no cotton mouth as you breathe through your nose. No mouth fatigue. You use your own regulator which is nice, field of view is great it does have a larger volume than a reg. mask, this was not an issue.
A factory rep was on site to help with questions. So end result was my Buddy and I each purchased a spectrum. Will take delivery in two weeks.
So I know we only had an hour on the spectrum test. But in my opinion this mask is a game changer. I dive with cruise ships a lot and have had my mask kicked off by novice divers, now I tend to stay back and linger, some DM's don't like that. With the spectrum having a mask get kicked or a reg come out is all but impossible.
I am not a person who buys on the spot. I got to try this product and test it using my own reg. For me this product is worth at least a demo dive.
Paul L
Channahon, Illinois