It will cook some. But it also likes to have a little bit of time between hits to build up the conduction/radiation vapor again. If you chain hit it, you won't get the hits you will if you give it a rest between hits. You don't want to wait too long, or it will cook, but that's when the auto shutoff feature comes in. I had a glass cleaning session the other night and was hitting this thing throughout. As any good medicating would do, I forgot about it twice and both times it was already off.
I think the following is happening...the shape and depth of the bowl create a pretty good amount of radiation heat, similar to the mflb, but I think even more so. So while the conduction is cooking the edges touching the bowl, radiation is working on the middle. I'm not sure which method I think is producing the most vapor, but I think convection is third. Whatever they are doing, it works.
The bottom line is this has become my go-to portable and it medicates me more and quicker than my others due to a quick heat up time and a large, accommodating bowl.