With my eGo-T, I've found that it eats some juices alive. It would cost a fortune to vape one of these juices in an eGo-T. On the other hand, it does a good job with thicker juices, I think. Maybe cause there is no polyfill. One example is TW's Decadent Doppio Espresso. It is so thick the label says it will gel at cool temperatures. It's got all this stuff in it that separates from the rest of the juice. But it is really, really good juice. It works in my eGo-T, but I can even get it to flow into my cartomizer. Based on my experience, it's another reason for using more than one type of ecig. I do wait for the day when my "coffee" will be hot in the morning. Until the eGo-T heat problems are solved, I just have to imagine I'm vaping some sissy coffee drink from Starbucks
HTH,
Dave