i just got a pack of these from ty over at vapure here in san diego. these cartos are great in my opinion. i am using it on a regular 510 and on a riva 510 battery. both at 3.7v i guess. and i have had great results. im not a huge fan of TH, however. i enjoy just enough to know that there is something going down. but compared to the genuine joye cartos, these blow them out of the water IMO. no plastic taste, no burning taste. its basically about 80% of the flavor i get when dripping onto my debridged attys. so it makes for a great PV while driving.
i dont know if it makes a difference, but instead of using the soft cap that they come with, i just pull them off to fill the carto and then replace it with a more comfortable drip tip.
i would now like to try the LR ones once i get through these 5 that i have though. but as of now, im extremely happy with them.