There's a big difference between efficiency and wastful.
Because of the design in and it's power it will cook through your load. But, if you use it correctly it can be much more efficient than other devices of similar nature.
For example, when I use the unit I don't tend to spend much time between hits therefore I'm avoiding the device cooking my load while on hold. This is something that has riddles portable units for years. We brought up the ascent, that's a perfect example. That unit doesn't have a cut off timer like the mighty. This led to us putting the unit down between hits, taking too long at times to draw some of the heat out of the chamber essentially spending your load before you get to enjoy it.
This unit, because of its timer (albeit a bit annoying) enforces that you never leave your vape unattended. If your constantly holding it, your constantly pulling. What I've personally experienced is when full, starting at about 345° and working my way up to about 410° I get about 6 to 8 solid fucking hits.
Comparatively speaking towards other portable units the hits delivered from the mighty are on a different level. Take this from someone who's been a vaporist for over 5 years. The hits you get from the Mighty are more like desktop draws. So, what I'm trying to say is that yes it will blow through a load quickly but to answer
@lwien it definitely extracts everything from the plant.
All in all it is efficient if used right. If used incorrectly than she's gonna burn through some herb. But keep in mind, for that to happen someone has to actually hold it in their hands to keep it from automatically shutting off without taking a hit.
Sounds a bit silly when put that way. We don't need to argue, we just need to help eachother figure out the best way using this thing.