Mine worked pretty well for 3 months of hard use - I only used KR8 cartos with mine. I bought it last June not long after I first heard about them. A lot of folks had problems with the switches failing. If mine failed, it was caused by
juice or other gunk getting into the switches, and I was always able to bring it back to life with an alcohol bath, and working the switches while it was dunked in the alcohol. Leaks were the biggest problem. Initially I was able to manage leakage pretty well by making a paper towel gasket to slide over the needle assembly - the gasket would catch any wayward
juice, and I'd just change it out as needed. Being sold on the concept of a bottom-feeder, I ordered a REO Mini as soon as they became available. I still used my WetBox on occasion for some time, but the leaking soon became unmanageable, so it now occupies a space in the bottom of my
vape stash box. I think I got my money's worth from the WetBox as a reasonably inexpensive introduction to bottom-feeders.