Product review (5 stars): Any amateur can do this
Quick easy install.  I am not mechanically inclined.  This is a very simple item to install.  Remove the back panel (6 screws).  2 additional screws to take out from mounting.  Unplug each connector, and attach in same location on new timer.  Mount the timer w/ the 2 screws.  Panel back on.  10 minute job tops. Highly recommend you DIY and save on paying a service tech to do this.