Have not used "in the field" yet, but vision is good in my backyard. Fits in nicely in older version of Bolle (not one that was listed) goggles. I imagine it would work in various models with similar lens/frame sizes. They simply slip in frame which is nice so they can be swapped between various goggles/lenses/colors. Seem durable.
Pros: Transportability
Cons: Big
This review was written in the old system and had content requirements that are different than reviews written today.