New Winterizing Device

I came across a new device to help winterize boats today, its called the Sea Flush and seems to be a simple device to help boaters do it yourself. check out the website to see what I am talking about, seaflush.com Anybody seen or used this product yet? I'm thinking about buy one to save me money in the long run, mechanics get expensive. It'll also help with clogs and maybe I an figure out some other fun thing to do with it. I just wanted to see if anyone had thoughts or reasons for me not to go this route. Thanks.