This was my first real mod. I had few Halo G6 ecig but was decieved with the poor battery life and small cloud. I wanted more and the Aspire Zelos was perfect, not too big not under powered. The only "bad" thing I can say about this device is the glass on the tank is stuck there on mine, I've never been able to remove the glass. One more thing is I dropped the device few times on the groupe from waist height, maybe 3-4feet and my first device is now on the edge of breaking in two part.