I'll tell you my story and you can decide my opinion for yourself.
I lost my Atomic Frameless mask a few days ago during a surf entry (and yes, I was wearing it at the time, there were just some large boulders involved...). I didn't get to dive with the people I'd driven for an hour at 6:00 in the morning just to dive with because no one had a backup mask on them.
I went to my LDS today to replace it, and figured since I was there I may as well try on some others that I hadn't gotten the chance to try on when I bought the original one. Most people avoid shopping with me because I am willing to try on every single item that even roughly suits my needs at a given location.
A half hour later I left the shop, the proud owner of TWO Atomic Frameless masks. One will be living in the pocket of my X-shorts from now on.
Masks are all about fit, of course. But if the mask in question fits you well, I sincerely doubt that there's a better mask available today.
I could be wrong,
Adam