I installed the unit within minutes of receiving it in the mail. I have a Roomba that is at least 5 years old but one of the wires on the brush frame has broken. Since this part is less than $50, it was worth ordering and swapping out the old part, not the new Roomba. I hope I have 5 more years! With the exception of the brushes, this was the only part I had to replace and it was EASY and a perfect fit.