So far I've rattled through a couple of tanks each of RY4v2 - Gorgeous, but just the wrong side of all day vape for me personally. RY4v1, Delicious, more deeper flavour compared to v2, and just the right side of all day vape. Then Haze... OMG That's one lush juice! Easily an all dayer. I've yet to try Praze. I'll order the other ones mentioned a post or two ago and also try them, but so far I'm blown away by the quality and flavour. All mixed at 20%, which I believe to be the recommended strength.