I use a joye 306LR atty from Liberty flights, but have heard great things about the Cisco, and even more great things about Ikenvapes LR306, but I believe Iken is out of stock right now.
I have heard they are hard on ego batteries, but so far after 3 weeks, still going strong, and I do not notice any shorter battery life. Even if there was, I feel the ego battery costs, and the incredibly better vaping experience, I would still choose to use the LR, and pay the extra for more batteries.