Really smooth. Love the vanilla and already down to 6mg. Easy to use, charge and fit liquid. Only thing I don't like is the blended tobacco. Tastes vile and makes me feel nauseous. Probably OK for ex cigar smokers. Vype pen is proving great for quitting cigarettes. Now over 4 weeks since last smoke. This has been the first success in quitting ( tried many times) and I think Vype has been the key for me.