I have been using this for about a month now and am pretty happy with it. For me, the reason it did not rate 5 stars was the clip has a small gap making it hard to attach to stuff. It is strong, but hard to attach due to the narrow opening, so I attach it to a carabiner & then the carabiner to my belt or backpack. The case it self seems very sturdy and has already kept my Oakley Half Jackets safe from being dropped or squashed. The case is large enough to fit my sunglasses AND my eyeglasses (with keeper string), which are on the smaller side as they are readers. I have not used it but the snap strap looks like it would fit well on a belt so long as the wearer is slim or has straight body lines. The snap seems strong.

Solid case. Slightly too big for my sunglasses, but easily solved with a microfiber cleaning cloth which I wanted to carry anyway. Attachment points work, but I modified them for my specific purpose. Materials seem quality, and zipper is functioning flawlessly as of the review.

Large case which is good for travel. Clip
Is plastic which causes me some worries as to how long this will hold up. Works great currently. Will most likely replace clip with a metal clip. I use this for my sunglasses which are oversized. Too large for regular everyday glasses. They rattle around in this case.

Bought these to carry in my day pack for excursions that go beyond sundown. The clip seems adequate, the snap for the loop functions properly. The inside lining has a cutout over it with felt glued in place; should it fail replacing it shouldn't be too much of a problem. What matters most: The case easily fits my old style Oakley Half Jackets, as well as the modern Madman model, and feels rigid enough to keep either from being crushed.

Like others, my spring clip broke the first time I used it. I haven't really noticed a time when i wish I had the spring clip, the plastic clip grabs ahold of everything I put it on and is usually picky about letting go. There is also a belt loop with a snap, which I haven't used. I did fit it onto my MOLLE backpack and it worked, but seemed out of place so I didn't leave it there.

The shell is reasonably hard, and should easily protect your glasses from a drop. If you sit on the case, it won't hold up forever. It will however let you know you are sitting on something you shouldn't be sitting on, and your glasses should be fine so long as you don't continue sitting on them.

I use this case for a pair of prescription WileyX glasses, they are large and they just barely rattle inside the case. No, you cannot fit 2 pairs of glasses in here unless you are an idiot and want to scratch them up.