I have been running an I Clear 30B since I first saw them reviewed, and LOVE it. I can only compare it to an I Clear 30S and Protank 2, but it's amazing comparatively. No gurgles, great flavor,and great vapor production.
The black bands easily scrape off with your fingernail, which worked for me since I didn't think they looked good anyways.
By far the best bottom Fed clearomizer on the market!
Sent from my Kindle Fire HDX