Anybody tried Z-Quiet or similar mouthpiece?

I wear a night guard for tooth-grinding anyway, so I thought I might try one that also aims to stop snoring, save my partner the trouble of earplugs. The only one I know of is called Z Quiet

http://www.zquiet.com/

Anybody tried it? Tried other products that do the same thing? (What attracts me to this one is the fact that you don’t have to boil water and “fit” it to your teeth; I’ve never had good results from doing that.)

Thanks to anyone with positive or negative experiences with this or similar products!