At it's core this is a great auto-bubbler. quick, clean, smooth. However, the ability to thread in any 510 AND drop in concentrates as you see fit, this thing is amazing. The battery life is great (enough where I am surprised when I have to charge it), the hits are absolutely amazing. Smooth clean milky white vapors. You will 100% burn through 510 carts faster that you normally would, because you are taking bigger hits.