Sorry to hear your 510 isn't living up.
Bear in mind its never just like a cigarette. I can't feel vapor in my lungs the way I would with a cigarette. The flavor does hit your mouth more than cigarettes do also.
You will probably taste the base ingredient a little bit also. I prefer PG over VG though many people prefer VG. To me PG tastes dry and VG has a little bit of "funk" to it which I don't care for.
For cravings I was in the same boat. I wasn't able to switch to the 510 completely for almost a month. The e-cig doesn't seem to deliver nicotine as quickly or thoroughly as cigarettes do. 24mg is also too low for me, though I have managed to make it work.
I'd suggest:
1) Try some new
juice you think you'll like better. It will take awhile for the new
juice to overcome the leftover juice in the atty.
2) Don't try to quit smoking. Thinking about smoking causes cravings so don't think about. Use your 510 to keep busy but smoke when you want to. Over a weeks time my smoking naturally went down.
3) Keep adjusting your technique.
Keep in mind atomizers go down hill with use. Mine go from great to good in a week. By the end of a month they work but not well. Some atomizers are just made better or worse than others too.
-Gooney0