I aint tried ry4 yet, despite vaping for around 18 months. I have a bottle of ry4 concentrate in my chefs vapour basket to be ordered soon, it gets no bad reviews that I have found.
only 2 ive tried and both quite nice are from LiQuid £1 10ml and Drip Drop £5 30ml
as always tastes are subjective and what one likes the other may not.