Product review (2 stars): Did not last even 1 year
These are decent aftermarket replacements, and will do the job in a pinch.  In my experience, these Delrin (HDPE) slides did not even last 1 year in my household.  Classic example of "You get what you pay for". I replaced both the front and rear bearing slides at the same time.

Longevity issue aside, I would order this kit as spare parts to use as the outer pair of slides; but for the TOP pair (which gets the most wear) I will go back to using the genuine "green" slides made of a different, more robust material.  The same goes for the rear bearing I used, which was also made of Delrin.

These parts are easy to change out, but that doesn't mean I want to change them out every year.