Mine is WOW Vanilla juice from V4L.com (and they have LOTS of sales so at least sign up to get sale notices because their shipping is a bit too pricy for small orders). I wait for sales and stock up.
I tried a LOT of vanillas and although I liked a number of them, the ones I liked most dropped a ton of flavoring sediment for a light color juice and would just crap up my cartos, ruining the drag and wicking. I tried all fo the V4L vanillas and the only one as strong as I wanted was WOW Vanilla. Nice thin clear juice, probably about 80PG/20VG judging by consistency and vapor (which is exactly what I like to use in cartomizers). And I don't see any sediment from it yay.