I can tell you as compared to the Myrtlezap which is similar to the PD from what I have read here.
With the LB you have to inhale SUPER slow/light... that is, just barely breathing in, not like a normal toke off a joint or cigarette. Rather, it's a long, deep, S L O W gentle inhale.
On a new battery properly loaded with finely ground and dried herb, the LB hits pretty good, I'd say I get about half or 2/3 of a normal MZ hit (not a heavy MZ hit).
With mine - it seems to run cooler than some others here - it won't combust unless I just let it sit there for a long time.
So, the key with the LB is to inhale VERY slow and long and light, and use a fully charged battery and have finely ground and dried herb filled to the top of the shoulder of the trench (bowl).
It's a great little device for quick discreet use when traveling or for quick discreet home use or use at a family member's home or something like that where you want no smell and you want to do it quickly and easily without a lighter.
For home use, where I want a bigger hit, the MZ is much better and no worry with batteries. With the LB you really do need to use only freshly charged batteries. With many batteries even if they sit around for a couple days, on your desk, they lose enough charge to keep from getting optimal hits with the LB. Now, the new LB batteries may change that last statement as they are designed to hold their charge longer when not in use.
My way around it is to have 6 batteries in rotation and since I have a Maha travel charger, I can actually keep them in the charger and they get just a trickle of charging after they've been charged, to keep them "topped off" and ready. But if you're carrying them on a day trip or something you'll want to have 4 or so fully charged batteries with you because after the 4th or 5th hit the batteries really weaken to the point where you get very little vapor.
Good way to feel out the waters, so to speak! 
