Has This Sinus Rinse Worked for You?

I got that stupid cold/flu thing or whatever it is. I can tell you, it's kicking my rear. I'm wondering if anyone out there has ever tried this method to "loosen up" their sinuses? I've seen it used many times by friends of mine but I've never done it myself. It's gotten to the point where I need to do something.

The sinus pressure is pretty bad right now and I plan to get one of these, but I'm a little hesitant to try one because I'm not used to putting water in my nose!

Have you ever tried one of these and, if so, does it work?