You can crank up the heat and get full extraction of a decent amount in 1-2 hits. Check out some of the videos in the main FlowerPot thread;
@invertedisdead has some big bong rips there for example.
It does have a very open airflow, so if you want thicker vapor faster at lower temperatures the carb cap helps. At higher heat settings it’s optional even for that in my opinion, but I’m glad I have it when I want it anyway.
I always recommend extra screens too, and be aware that if you don’t buy a stand (or buy the HOT post and make your own stand) you’ll need a coffee mug or soldering iron stand or something that you can safely put it down on while it’s on but not in use.