It was very easy to fill and use. The only design flaw it has is that you are unable to get all of the water out because of how you have to hold it, so you may have to add more water.
This product doesn't even have to be plugged it. It is battery operated and it comes with the AAA batteries needed for it. It also comes with 15 saline packets that are infused with eucalyptus and aloe vera extract to help wake up your sinuses and soothe them at the same time.
Coupons for a variety of Sinusense products are available HERE.
I was gifted with this product for the purpose of review. Compensation was received to write up this review, but all thoughts, opinions, photos, and videos are my own.