I was pleasantly surprised. Had an old e slim kit for vaping e cig juice and I stopped using it cause it had no temp control or any fancy features. But, with an atomizer for use with concentrates, everything is just perfect as it is. Hits smooth, produces great flavor, and is sleek and stealthy. Nobody could have any complaints just cause of price point and ease of use. Thought I could just put old parts to use, but as things break down or burn out, I will continue to buy new parts for this item!