I had a problem with the torque shaft gear on a 7-9 year old 909 deadbolt elec. lock and Kwikset support helped me via online chat to identify the issue and sent me a whole new replacement 909 deadbolt lock.  I am very impressed with this company readily honoring their mechanical warranty and freely shipping a brand new item to me in a reasonable timeframe.    I easily installed the new 909 and am very happy with how this product works and looks good.   Note:  I can see that the new model includes small improvements over the older model which tells me Kwikset is earnest about making things better for users.