I got these goggles to use at Burning Man in the Black Rock Desert. I needed dust goggles that would fit over my spectacles. I will also be using them for winter bicycle riding.
The goggles are a bit bulkier than pictured. I suspect the pictured goggles are the standard variety, not designed to fit over spectacles. They also came with some knobs on the lenses, perhaps for mounting sun filters? Not sure, but they do interfere a bit with visibility at first, until your brain starts to edit them out.
In use the goggles worked fine as dust goggles. They fit easily over my spectacles but not over my "old man" sunglasses that also fit over my spectacles. With the goggles on there was zero noticeable dust penetration to my eyes. They breathed well in the hot desert and remained comfortable for extended periods. (I think the longest I wore them at one time was about an hour.)
The foam is very soft and I do worry it will not be durable, but only time will tell.
I look forward to using these for winter bicycle riding to take the chill off my eyeballs, though I will likely need to purchase a polarized lens since I will be biking into the setting sun and my over the glasses sunglasses will not fit under the goggles. (Maybe those knobs will mount a polarized filter.)
I strongly recommend these goggles, reserving my judgement on the durability of the foam. (Posted on 9/6/11)