I've tried their stuff, and I ordered a higher nicotine content than I usually vape figuring that it was probably somewhat diluted.
Walrus is right about the dilution factor. Dilution is dilution, pure and simple. Basic high school chemistry.
In any event, I personally like the flavors I've tried--caramel, butterscotch, lemonade, clove, raspberry, and cheesecake. Having said that, I should add that there is a HUGE difference in taste depending on which device I use to vape with.
In my Dura-C (510), the taste isn't nearly as strong and flavorful. But, then, I find my Dura is a harsh vape, and it provides a hard hit, but typically at the expense of flavor.
Using my Kissbox with a generic atomizer or, believe it or not, with my Screwdriver, the taste is much more flavorful.
The only other criticism I have is while I like the idea of the childproof bottles, I HATE the droppers. The droppers are huge, like the kind that you use to give medicine to babies. But really, with bottles that size, you should be transferring some to a smaller bottle, then putting the big one up. In any event, the big bottle is NOT one you'd want to drip or refill cartridges with. Too little control.
For me, I enjoyed the flavors but I'm not jumping up and down about the liquid. So my opinion is good but not amazing.