I installed this lever and perch after I rode with a bent stock lever for about 2 years, which never gave me any problems btw. This Sunline perch and lever basically run off Aunt Jemima and melted butter....this thing is sooo smooth there's no other way to describe it. Also, unbreakable is a fairly accurate description. The movement works off of internal ball bearings that are definitely top notch. I've never seen such quality on any other lever and perch set-up.