It's ok
If you make a tight seal with your mouth to keep smoke from getting out that way, this thing works amazingly, no smoke comes out the other end at all. It hasn't been the most effective in keeping my smoke from being smelled by others because of the seal you need to make with your mouth, but it works ok. It still makes a huge impact on the amount of smoke that enters a room. And it came with a fun little "smoke buddy" keychain that you can like pose and stuff : )
Rating: 5 stars