The motor and chain was delivered ahead of the predicted delivery date which was great. The track, chain and motor was easily assembled with basic tools. The addition of the external keypad was very welcome and swayed me to purchase this system and I was glad I did. The operation is slick, quiet and relatively swift. I would highly recommend this product with the caveat that it has only been installed for a week. If anything else come to light that affect this review I will post an update, but so far, so good.