I have to say they are beginning to grow on me. I think mine did come with primer? I did clean one and now its fine. Its vaping pretty good, yes I do notice that the wicking is an issue as long as i dont vape consistently and let it rest its fine. Turning it helps. I have had a problem with filling them I am assuming its the crappy things they come with, i have yet to get a blunt needle so juice was going everywhere, i figured out putting like .5ml in let it sit and put another 5ml helped when filling otherwise it really just would come out. Im vaping a 80%pg 20% vg mix so its not thick. But i do like not having to mess with carts its less to worry about losing.