The two point deduction, there are therefore one can really apply the goggle strap only with conventional brackets, just like the Aviator. In my sport - sunglasses by Alpina (Wylder) I do not get it through the strap over it and exactly for such a spectacle I've actually bought.
The goggle strap looks up at a, I'll call it fashion glasses as the RayBan or another brand, not really good. But I wear it on my Aviators cosiness. I put the RayBan unwillingly into your pocket because I am as happy to put time on it.
Once I go on the water, mountain biking or go jogging comes my Alpina sunglasses for use and exactly as I can not use the goggle strap. This is a real shame and for this price you should be able already expected.