Product review (5 stars): Better than the original!
Excellent. Arrived quickly and is much sturdier than the original knob.  It fit perfectly on the old Kenmore Heavy Duty 70 Series at my Great Aunt's, and I (a clumsy humanities student) installed it with no problem! If it seems like you're just twisting forever, try pushing the knob in and then screwing it on the rest of the way.