I started out using CE4s with an EGO battery. Then I went for the CE5 wickless which worked a little better. Shortly thereafter I purchased rebuildable CE5s. The recent quality of these tanks became awful in my opinion and they began to frequently arrive with manufacturer's defects-namely, mishapen gaskets. And most of you know by now that without a properly shaped gasket, you're screwed! So about a month ago, I took the Kanger T3 plunge! I have to say that Kanger provides the BEST bottom coil tank in my experience this far. It's very low resistance so you get a better flavor and MAD vapor! Easy to fill. Easy to clean. Easy to reuse. Plus-they're rebuildable! If you're searching to an alternative to those CE4s or 5s? Give the Kanger T3s a try! I use the clear ones-and in addition, they can hold 2.4mL of juice as opposed to only 1.6. Happy vaping!!