Because this model matched my previous model, the install went smoothly, except for the electric code.  I should have purchased the same model with the cord attached.  Fortunately, I was able to remove the old cord and attach it to the new model.  But, if I had purchased the model with the cord, I would have finished the job in less than 1/2 hour.  So, buy the same model with the cord attached. It will save you a lot of time.