I have the mini, I used it out of the box, seems ok. I'm comparing it to the protank. I want to like it, but it just doesn't seem to give me a good vape. The flavor and TH a little burnt tasting, and vapor is ok but no where near the protank.(70/30 mix) Not sure if trying a different mesh would change anything. I know this SS mesh is popular, but at this time its not going to be my go to device. The jury is still out for me anyhow.