This is my second IQ2. I like to have a variety of DaVinci vaporizers so I can alternate them so they don't get too nasty in the flavor chamber and the oven. I usually change out the flav every 4 tries and have extra clean ones ready to go when necessary; same goes for the mouthpiece. Overall I am content with the IQ2 because I know how to use the silly things now. Before I didn't know how to use them and got frustrated with my pieces. Today I am a happy camper and have turned on several of my friends on as well as my brother. Really good product. I think I have been using the DaVinci Vapes for over 3 years and am a walking billboard for your product.