I have a hana and absolutely love it. Build quality is phenominal, has been very reliable and consistant. No matter what i'm throwing at it. All box mods have their ups and downs, Higher wattage ones tend to be a bit larger then a dna30, i personally see no need for the high wattage for my particular usage. A few of my friends run there mech/drippers into that higher almost 100w range. Me personally i was always around 20-30 watts but I don't care about clouds.