Love my protank, but just as others have warned, it broke at the threads this evening. I was playing volleyball with the kids at our pool and my ProVari/Protank setup fell out of my pocket. (I was spiking it on my twelve year old daughter. In her face! Lol) Anyhow, I got sand in the mouthpiece and tried to tap it out and it broke. I think it's just going to be one of those things. So word to the wise, If you have a protank and that is what you love to use, buy a couple so you won't be stuck with the vivi nova like I am tonight. Although I have to say, I remove a few wicks and shortened them, set my volts a bit lower, and it's not bad. Thanks to the ECF folks who post all the tips for good vapes. Happy weekend vapers.