I had posted on the BIG THREAD earlier about Tropical Vapors. I will get into a little more detail here. I purchased a YJ Lavatube from Tropical Vapors earlier this month. Turns out the thing simply does not function well. It burns the juice no matter how low the power setting. Xfoo helped me dig up some info. Turns out, this unit has a 33Hz frequency. That is very low! And especially when combined with pulse width modulation. It's just a poor design despite that it delivers dead nuts power accuracy across the range of settings. Xfoo and I concluded the power is peaking and dwelling too long and causing hot spots on the coil. That's our story and we're sticking to it. By the way, for you ProVari owners (including me now), Xfoo also found that ProVari incorporates PWM as well but do it with a 800Hz frequency. This flattens out the power delivered through the PV. It probably also, in part, explains why a ProVari is expensive.
But I want to say that Tom at Tropical Vapors was very cooperative and understood my dissatisfaction and agreed to refund me in full. I gave him an option to keep my money and exchange my LT with a VAMO even though the VAMO lists at $12 more. He agreed. So I will be joining the ranks of the VAMO wavers soon. I'll use it as a work PV or a backup or give it to the wife or something.
Tropical Vapors stands behind their products so if you dig that, give them a browse.
Tropical Vapors - Quality Electronic Cigarettes at Great Prices