They look great..... I just wish they were glass!!! 

It looks like these heads cannot be maintained either. The outer cylinder makes it impossible to change flavor, clean or dry burn.
pizza, it won't leak upside down until you take a draw. not a deal breaker for me just won't do that again.
How did you manage to change flavors?Didnt notice the oil flavor with the one that came with the VTR. I like the 30s. I didnt find it to hard to change flavors. I have no plans to buy another one but I like this one. I'm probably going to hold out for the Protank 3 dual coil. Id buy another if it had glass tank.
Your link is for a Kanger Protank, entirely different tank and manufacturer.
How did you manage to change flavors?
Has anybody with these new 30s tried vaping while laying on your back (mod upside down) to see if it leaks into mouthpiece?
It looks like these heads cannot be maintained either. The outer cylinder makes it impossible to change flavor, clean or dry burn.