chrispete:
There is supposed to be a version coming out at some point for 20/20 divers that doesn't cost multiple thousands of dollars...
Quite the opposite, actually, last time I read their site (a couple weeks ago).
They are developing a new version for the Navy that works for people with normal vision. It uses all kinds of exotic glass to accomplish that, however, so it will cost a small fortune once they release it.
I found out about these masks literally two days after I picked up my new mask with brand new prescription lenses. I was pretty steamed. I've since done more research, and now I'm less steamed.
First off, if you have astigmatism or need some other special lenses such that you can't buy the "off-the-shelf" prescription lens adapters for your mask, you are looking at approx $200 to do custom lenses for your regular mask (plus the minor cost of the mask itself, if you don't already have one). Turns out to be around the same price as the Hydrooptix masks... that's why I was annoyed when I discovered them.
As for the HO masks (easier to type!), they are wicked cool, according to everyone who uses them. BUT again, unless you hit the target nearsightedness level, you have to wear contacts while diving. I've worn contacts in the past, but I've never really liked them. If you already wear contacts, and don't plan on going the prescription route, this mask is an excellent (if spendy) option.
I don't like contacts (especially in salt water) and I don't quite hit the target prescription, so for me, the HO mask doesn't quite work out. Also, they have one size, and if it doesn't fit your face well, you're SOL. If didn't fit my face as well as my current mask, so again, I'm OK with passing on the mask.
One issue I've seen mentioned a number of times on this board: If you get any water in your mask, with a regular mask, you clear normally, and the few drops you can't get out just stay in the corners and don't really bother you. With the HO mask, because each lense is a bowl-shaped dome, anytime you look down, those few remaining drops will eagerly move up into the lowest part of the lense... meaning anytime you are looking directly down you will be staring at drops of water right in the middle of your field of vision. I've never worn the mask, so I can't say for sure, but it sounds pretty annoying to me.
All that said, if (a) I didn't have to wear contacts to use the mask, and (b) I hadn't JUST spent $200 getting a prescription mask, I probably would have tried going that route. The people I know who have contacts anyway and whose face fits the mask well LOVE it.
So bear all this in mind, and armed with the facts, make your decision. Only you can know what's the most important to YOU. For me, it was all about simplicity (and cost, since I had already spent the money), as much as the geek in me loves the very concept of the HO mask.