I am so amazed with this hot tub.  Delivery was a way out (ordered in June, delivery not until December).  So if you are debating about this hot tub, order soon because you may have to wait awhile for delivery.  Easy to set up, heated up quickly during a typical Michigan winter.  We used the factory installed 110.  I did have to order a different filter as the one they sent with the hot tub was the wrong size.  Also, no sample chemicals come with it, so make sure you have your chemicals when the tub arrives.  Very comfortable, great purchase!