Works really well.
I've used other copper tongue scrapers but for some reason I really like this one.  It's lightweight, fits easily into my mouth, and does a good job scraping off the white film on the back of my tongue.  Some tongue cleaners have felt rough on my tongue, making me gag, but this one doesn't.  It's affordable and came with two tongue cleaners.  I would buy this again.
Rating: 5 stars