you will find that the real sweet spot voltage wise will change from attie to attie , juice to juice and mood to mood . the only way to find it is with true variable voltage . since i got my Buzz 2 weeks ago i'm not always fiddling with it , but wow it's great to be able to "tune" it to my vaping needs !!! you'd be surprised the difference between 5.10 and 5.25v . mmmmm 5.35v when you need a good strong quick hit like when i'm at work and don't have the time to take a nice long slow toke.
also the regulated voltage means the same great vape from start to finish , unlike non-regulated which will continually change as the batteries discharge .
Happy Buzz customer