its amazing how results differ from person to person. I have read posts ranging from a lot better then cotton to about the same to not as good, while some say the rayon is too good as it makes the juice to sweet and lastly that the rayon is muted compared to cotton. I love rebuildables and have tried just about every type of wicking material out there cause that's what I like to do so I figured to give this a go, I purchased a huge 3lb box of this yesterday and this morning been messing around. started on the most lowest wattage set up that I have, its a 1.3 micro coil on my provari which I vape at 14 watts. now I must say that I never had any issues with cotton, for the past year I have been using cvs sterile and completely love it, it performs awesome on all my attys that include drippers, kayfuns, aquas, and foggers. I can vape cotton in any atty up to 20 watts with no issues at all. a lot of the posts I see here in favor of the rayon state that they could never vape cotton in their kayfuns or aquas much over 12 watts without dry hits so im thinking that the rayon is easier to achieve better results then cotton but not necessarily a better wicking material because im just not seeing that much of a difference to cotton. so far I have wicked this coil 3x's with the rayon, the first time I didn't use enough material because I heard the sizzle after I stopped firing the device (that's my findings anyways) the second time I over did the amounts and tasted the funk, the 3rd time was a charm and been vaping this one for about an hour. what I am finding is maybe slightly more vapor production as cotton but just maybe, and the same TH. as for flavor maybe not quite as good as cotton imo with this juice. I must say however that I do believe it wicks better because back to the crackling sound, there are times with cotton that I have wicked a coil and as I vaped it, it makes an over excessive crackling sound. not so much as your firing the mod but after you let go of the button. imo when you release the button and this sound continues for a second after releasing the fire button it means not enough wicking material. every single time this has happened to me, what follows is a dry hit, I rewick with slightly more cotton and the sound stops when button is released. its the length of time this crackling stops after releasing the button, because with a good build it does happen, it just isn't as long of a time. like right now I do have a great rayon build in this atty and when I do release the button, the sound does continue but only for a fraction of a second, with a "not enough material build" in the coil, this sound might continue for over a second, maybe 2 seconds. anyways with cotton and this long crackling sound, it always results in dry hits, now with my first rayon build, the one with not enough material, no dry hit at all, this tells me that even with not enough wicking material the rayon still works, so strand for strand the rayon does wick better then cotton imo. my end results, rayon wicks better then cotton, may produce slightly more vapor, about same TH but slightly less flavor. I have only been using the rayon for a short time and maybe these results are premature so I will post after more time but for now I think I like my cotton better mainly because of the flavor profile. also maybe because cotton is more finicky people weren't getting the max results they should of been getting and with rayon possibly being a more forgiven material is why I am seeing such varied comparisons. one last thing, I do like working with the rayon better then cotton, It just seems easier to coil maybe because the strands are straighter and stronger. one thing I must say is im sure the rayon will last longer, it seems very strong, unlike cotton you cannot really pull the strands apart with your hands, I mean you can separate the strands with the grain but against the grain its really strong. so all in all this stuff is very good imo, really just as good as cotton, the more I vape on it the more I like it but im just not seeing it being that much different to cotton