5 stars is not it, but good!

One does not fit a model to the other.
One can spend a small fortune on the search for the perfect glasses.
One should not give up immediately when you first do not get tight too.
And I did not.
A grid to fixed / to set loose will cause water breaks.
You can, however, happen at any glasses.
I had some initial difficulties with these glasses,
now I'm super happy.
If they are under control, it is comfortable to wear.
The view is great when compared to "conventional swimming goggles".

But why only four stars?

AQUA SPHERE glasses generally have a disadvantage:
It has a very good field of view, but you do not really "sharp".
With a Malmsten-Sweden glasses I see absolutely sharp (though somewhat limited in field of view)
and may my Garmin Swim watch read (very large font) underwater.
That does not work when AQUA SPHERE glasses.

That should just know.

In the pool, I can live with it, because there hanging clocks, but the lake is not!
From the style, is an AQUA SPHERE glasses, but really a spectacle for open waters.
I have to actually stop and read about water.

You have to know what you need.

Maybe I'll find even the perfect glasses for my needs.
This is close.