I still can't believe vaping was this cheap to get into, and as effective as it is. I've planned on upgrading, but I still don't see a need to based on how reliable these CE4's have been for me. I have a few rebuildable CE5's too, but I notice that juice sometimes seeps out of the joint on the bottom. Never w/ the CE4's tho. They're prone to a bit of juice in the center hole if you can't always keep it upright, but even then, it's an easy fix. I think I've had nice success cuz I don't overuse them - I constantly rotate 7-8 w/ different flavors. If you're using the same 1 constantly, it's worse wear and tear, and then if it starts leaking it sucks if you're relying on it. I'd already bought 15 or so I've been using the past couple months, and I've only taken 1 out of commission so far. But now that I'm into DIY, I love having a brand new clearo for a new flavor. I don't like mixing flavors together unless it's something I planned on doing. To any newbies/lurkers, this is the route I'd recommend tho, getting 5-10 clearos right off the bat. Cuz you have the ability to sample a bunch of flavors, and then if you do you have any leaky issues, you have no disruption to your vaping while you work on it. When I 1st started reading the forums I'd see a lot of ppl talking about the "fake knockoffs on ebay", but there's definitely good gear to be had for cheap if you do your research. Vape on.