I am about 3 weeks into my using this device and absolutely love it, refuse to use anything other than this now for smoking. Went from cleaning my bong set up every 3-4 days to once a week and even when i do that weekly cleaning, it looks like what was once previously just 1-2 hits with a lighter. if you're looking for a product to help reduce the coughing and hacking that comes with smoking this is definitely worth a try and im sure you'll love it.
ps. my only complaint and its not even worth taking a star off is that the small glass one hitter attachment thats including is wayyyy to small and really only good for a complete newbie that has no tolerance. considering this device is generally going to be purchased by pretty dedicated consumers i think it should be about 1.5-2x its current capacity