I use the TW DV flavors.
The menthol is excellent. With 50% crystals by weight, it is strong and peperminty like a star mint. I use 5 drops per 4.5ml batch, though some of my friends like double that concentration (scary). I am considering mixing in a little tobacco flavor to get the Newport folks a more realistic vape.
The choco-mint is a milder flavoring. It is a dead ringer for a grasshopper ice cream drink. It has been well received. I use a lot though, as much as 9-10 drops per 1.5 ml batch.
DV Apple Pie is my desert island vape, all day vape, and friends' top #1 favorite of my collection. This one is very strong and kind of smalls nasty in the jar. Mixed at 1 drop per ml it is quite caramely and a very rich flavor. Slightly less lets the more subtle flavors come out. Don't expect a lot of bright apple taste, it more about the sweet carmel and spice goodness of a warm apple pie after the apple's sweetness and the flavors mix.
I also tried the TW/DV Patriot Range Orange Cream. That is a milder flavoring, but a very good one. If I'd change anything it would be to add a little cream, the orange is slightly ahead. I might try adding a drop or three of my PA sweet cream, but it (the PR OC) is quite delicious on it's own merits.
If you only get one, try the pie. I have 21 flavors in stock (PA, DV, JC) and the Totally Wicked Decadent Vapours Apple Pie is the one that I use and share the most.
Best wishes,
R