Love them! I can't say anythzing but good things! I invested in a pair because I have awfully sore ankles. I found that regular stirrups were too heavy and jostled my ankles around. Especially at the posting Trot.
I love my Jin's because they're so much lighter and the wide footbed keeps my lower leg slightly more stable which means less pain in my ankles/lower legs!
Only downside is that they're quite pricy! I purchased mine on sale, but I've seen a few pairs for sale on used tack Facebook groups :)
Let me know if you have any questions about Jins!
Best stirrups ever! Holds your leg so still