Product review (5 stars): easy to install and working fine
Refrigerator condenser  fan had a blade broken which we realized when we were able to open
 the back and see what was making
the horrible intermittent noise. I ordered a new fan and it works fine.  One thing, my son wedged a
pencil between the fan housing and the frame to stop the noise before the new fan arrived
 and that worked good too.  Fridge
wasn't losing any cold air which I could monitor from my fridge thermometers.
Thanks to other commenters for the fix for when the fan was hard to put on the spindle,
A little vaseline solved that problem right away and it went right on.