Learning how to use it is the key to using any vape product.
To me, big ole sub ohm type tanks are terrible. The simple reason for that is I have never bothered to learn how to use them properly. I have no desire to do so either, so they will remain terrible in my book.
On the other hand, I took the time to learn how to get the most out of a cartomizer, and make carto tanks work properly. So they're a great vape.
Challenge for ya:
Take two very different flavors with two different setups for each flavor. Make the flavors vape the same in both setups.
I used carto tanks on Provaris', and RDAs on mechanicals.
When you understand the principles for doing that, you will probably be able to get a satisfactory vape from any product handed to you.