I have them on my IOx. To be completely honest, I don't notice much difference. I think it may give a little difference in tint compared to the red sensor lens but that's it. I was a little disappointed in the fact that it doesn't seem to change very fast, if at all. I think smith makes a great product but I don't know if these lens are quite there yet. I wouldn't be happy if I paid $100 for the lens alone.
I don't really notice any reflection though unless I really try and look for it.