I have used this product for three months now and I have to say that this is one of my most important pieces of equipment. I get complete field of view with these lenses and I never have to worry about my glasses breaking while in battle. Glasses are very uncomfortable inside the mask and often move or get tweaked while running and diving on the field. Remember, you cannot take your mask off on the field to fix your glasses! These inserts will not move unless you take them out and fit snug and out of the way of my face. This is a must have for anyone who uses glasses!
I highly recommend this product if you wear glasses. Sure, one may say I wear contacts. But how many times have you scratched or brke your contact lenses when rubbing your eyes because dirt or paint got in them. You should have these inserts as a back up at the very least. Remember, you can't play if you can't see!