And they are the business. I ordered 'em from Good Prophets, the only US vendor to carry them as far as I know, and they are WAY better than my standard Mega attys as far as vapor production, draw, and sound. Smooth draw and I was clouding up my office in about 4 - 5 good hits. 
I mention sound because I know a lot of people were talking about certain "wheezing/whistling" sounds from the cylinder types, and my standard one was no exception. It would gurgle and wheeze, which didn't prevent me from vaping, but it made my presence known if I wanted to stealth vape.
So as far as sound goes...there is none. I mean, aside from the usual sound of drawing it, there was no foreign sound of "..../bubbler" or "nerd" noises.
Just puttin' everyone up on game, for those that like using LR's.
vape on.

I mention sound because I know a lot of people were talking about certain "wheezing/whistling" sounds from the cylinder types, and my standard one was no exception. It would gurgle and wheeze, which didn't prevent me from vaping, but it made my presence known if I wanted to stealth vape.
So as far as sound goes...there is none. I mean, aside from the usual sound of drawing it, there was no foreign sound of "..../bubbler" or "nerd" noises.
Just puttin' everyone up on game, for those that like using LR's.
vape on.