I saw the discussion the other day about polarized vs. mirrored, but I wanted to get some opinions specifically about the utility of photochromic lenses. I just recently learned they existed. Theoretically, they seem like a good solution - not needing to bring multiple pairs of goggles to a race and deciding which pair to wear based on the sun in the morning. Or for if the sun comes out or goes away during the swim.

The Zoggs Predator Flex Reactor and the Huub Aphotic appear to be the two options on the market. Curious to hear from anyone who has tried either. Worth the money? They're pretty spendy for a pair of goggles.