I have tried the Blu vanilla pre-filled cart and it was very sweet and good (in my opinion). I have also tried the Viking Vapor vanilla - 16 mg nic, mixed pg/vg, full flavor. This was not the vanilla that I wanted, it's not sweet and kind of nutty. Something that you might like, but not my cup of tea. It's a little rough and not the smoothest, but again... no sweetness. Kind of hard to describe b/c I like the sweet vanillas. I have let it sit for a week now and still the same as the first day. Shaking the bottle isn't helping either.
They are the only vanillas I can give a review on.