I was a bit dubious at first but onepoundeliquid is legit and their flavours are on a par with 'own label' liquids from other stores that charge you up to £5.00 per 10 ml bottle. I needed higher nic liquids for my eRoll-C and ordered 8 flavours (which would all probably perform and taste a lot better in more advanced vapourisers, however, using 18 mg strength in my Ego Ones would blow my head off).
Tested on eRoll-C:
Lemon Sherbet - Lemony, not much sherbet
Very Berry - muted, berries didn't come through
Strawberry Milkshake - as above
British Tobacco - strong flavour even on eRoll
Black Tobacco - as above
Aniseed - Ok, a bit muted
Blueberry - as above
Menthol, no problem with this - well it's menthol.
The only quibble at this point is that the range of flavours is quite limited at the moment. They don't even have plain raspberry.