1) Instaling an electric operator will often make the door more secure.
2) Allows you to remain safely in car and close the door behind you, helpful at night time.
3) A must for people who have back/knee problems. No more lifting!
4) An excellent addition to mention if ever you come to sell the property.
5) Open that large, heavy double door at the touch of a button.
6) Impress the neighbours...?