I think the Cisco LR 306 attys are very good, they last long and produce a lot of vapor.. That being said, I personaly prefer the authentic Joye LR 306's because they too last just as long, produce a bit more vapor and most of all have near zero latency.. the biggest draw back for me when it comes to the Cisco is the lag you get vs. the Joye branded ones.. Also the Joye 306's are tappered in barrel size allowing the use of a wider variety of drip tips to be used with an eGo cone.. the Joy will hold a drip tip leak free with it being placed around the half way point of the 306's atty barrel, making it possible to use transparent tips that seat tight and extend past the cone where the Cisco needs an XL drip tip which is just too long and is probably adding to the lag time in vapor production.. Bottom line they are both worth their money and then some.. but for me I like the Joye...