I bought one of the Blu starter kits a few weeks ago. I've cut back from 1-1.25 packs/day to about one-half pack/day.
I avoided all the confusion over choices/names/&c by going to a store that only carried Blu.
The Blu starter kit came with 4-5 flavored nicotine cartridges. The tobacco and menthol cartridges have a reasonable taste but the coffee one was terrible. The fruit flavored ones were OK, but not something I would buy.
They are a little bit inconvenient because you have to recharge the batteries once a day or more, but the Blu kit came with wall and USB chargers and a "cigarette pack" with a built-in charger (recharge the batteries with the portable pack; recharge the pack via wall or USB).
The battery/cartridge combination is on the heavy side and difficult to hold with my lips. I end up clenching it in my teeth. The cartridge is fairly soft plastic on the outside so it is not uncomfortable, just different from what I'm used to.
I have only been using Blu for a few weeks but it seems to be helping. If you want to give them a try, you can get a disposable for ~$10. IIRC, the starter kit was about $45 (two batteries, chargers, and 4-5 cartridges). According to the pamphlet in the box, the cartridges come in different levels of nicotine.
Good luck.