I have been using my I/Os for 1.5 seasons and I like the FOV and have never had any issues with my red sol-X lens.
However, with my blue sensor mirror I've had terrible fog issues between the lenses, which ruin the whole point since moisture gets trapped in there and leave stains and so on. Actually I've had them even replaced once, but the new lenses also fogged in the first powder day (the inner lenses even detached from the lens frame).
Smith is not willing to replace them this time, so probably it is time to move on. I've never seen any spetacular improvements with the BSM in flat light, to be honest.
Right now I am considering the Spy Doom or Spy Platoon with their "happy lenses", but I have seen little feedback regarding how they actually perform in terms of contrast (specially in low light conditions).
Is the technology a gimmick or does it make any noticeable difference in contrast / visibility (specially in flat light)?
How do they compare with the more hyped oakley prizm? I've found some nice deals for canopy's with sapphire prizm, but in the price range I am considering they come with no extra lens.
Bonus question: Spy users, did you ever experience fogging between the lenses?
(please do not tell me not to store to goggles wet or wear them over my head. I've read it all when my first lens fogged and no luck afterwards as well).
Thanks a lot!