Vamo Watts setting works well but I didn't know how well until today this happened. I put on an 2.5ohm atty I haven't used for a long time and started vaping. I didn't notice anything unusual but when I checked the ohms it was showing 8 ohms. Vaped, checked again and again and the Ohms kept fluctuating between 2.5 - 8 Ohms for half an hour till it settled at 2.5ohm. The coil connection was obviously oxidized. The beauty of it all is that the Vamo kept the vape at the same Watts through all this Ohms fuctuation and I couldn't even tell a difference. That's pretty damn cool for device of it's price.