Of all the dive kit that is essential I have yet to find a really satisfactory mask. I am short sighted enough (circa -2.8 in each eye) that if I don't use a prescription mask I feel I am missing out though I can get by without one. This has meant I have a more limited range of options (I don't wear contacts) but having considered getting a bonded lens from Axis Optical has opened door a bit more.
In addition I have spent a lot of time in dive shops trying on masks to date I have owned;
1x Tusa liberator
1x Tusa ? (with replacement lenses but this work horse leaks so badly now that I suspect there might be damage to the skirt)
2 x Hollis M1 (intention to bond a lens on but not done it as of yet)
1 x Hollis M3 (now with the correct replacement lens)
It is a rare dive where I don't get some water in my mask, on other dives I have had the experience of having to clear my mask dozen or more times. I can only conclude that I have awkward face shape to find a good fit for. The two Hollis variants have been the best so far, fit a my narrowish face well but I still get some water creeping in at the bottom. I think this is due to the having the reg in my mouth that makes my upper lip lift up, disturbing the fit of the skirt just below my nose. Does anyone else find this an issue?