I have a pair here someplace. I never used them much and I think maybe I'll personally never get used to stirrups that move, lol. I'm not riding now, so none of my tack is getting used this winter. But that's a great price for those irons new, and lots of people like them. The original Flex irons swiveled both ways, which made them real weird for mounting. The II only tilts one way. You turn it around backward to mount. Much better design than the first ones.
When they start squeaking, put a drop of sewing machine or other oil on them and it will stop that. Oil, not WD40.