im using it..superb..u want?

Mods and atty aside, start with hi nicotine juice 1st, like 18mg and up. Any lower and you'll start to chain vape.

That's a subjective question mate There are a lot of mods out there. I personally have used cloupor mini and now VS rdna40. Cloupor mini is good (I like the form factor, easy carrying and it performs)  and as a precaution refrain fro  using the usb function. Swtich to VS rdna40 for the temp control function.  Start simple by getting a starter kit and don't straight away buying the pricey stuff because there is a chance that you might not like vaping.

Atty depends on you. Are you comfortable recoiling/rewicking. If yes go for RBA. Else go for tanks with replaceable atomizer heads. The good news is subtank mini provides for both and a lot of people here vouch for its performance.

I started with and used eVic mods with vivi nova tanks  for 2 plus years before changing to cloupor mini and KF4 atty.

In the words of pbusardo - use whatever works for you