Here's a review of three e-liquids from Janty, the inventor of the original eGo e-cig and the RY4. Covered here are Ludo's, RY4-X, and SE555. Here's a link to the full review and steeping notes. The Cliffs Notes version is:
Ludo's: This is a unique blend that uses Janty's DK RY4 as the base, complementing it with mint and coffee.
RY4-X: This is Janty's Classic RY4 with the tobacco cranked to 11.
SE555: This is a good, 555 e-liquid, but you can find as good or better for less money.