I'm still using one of my first devices, now about 10 months old and working nicely, a $10 MFS EVOD clone. However I have "supplemented" it heavily. Finally had my "dripper" revelation: stovetop coil improving airflow in my cheap dripper, NET.com's Big Spirit, very amazing in their "realistic" way and their juices didn't work for me in anything else at all, even earlier dripper builds. Still, with every other juice my cheap POS devices amaze me, they shouldn't be able to be so good. My experience is opposite enough to most everyone else that it really doesn't seem like there's a substitute for trying every option myself, but I can't afford it, so I've stuck with the cheaper ones.