If you're trying to quit, it works well. I honestly smoked around 3-6 hookahs/day by myself while working on websites. Since I started vaping around Halloween, though, I haven't touched one hookah.
To save a lot of money, though, build your own coils. 100ft of kanthal and decent pack of cotton is $10 for me as opposed to tank cartridges which sell 5 for around $20-25. Rebuildable lasts a lot longer, you can make different kinds of coils depending on how you feel like vaping and uses less ejuice. I still have my original roll of kanthal, too, and makes around 100-200 coils depending if you double wrap or not.
If you're on the go a lot, though, and don't feel like opening your RDA all the time to redrip it, then a tank would be better. Or get both.
Don't use nickel unless you have a temp mod and know what you're doing, though..
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