As an experienced mechanic, I find this soldering tool impressive... it is perfect for soldering applications in the automotive industry. Based on my experience, it has been able to maintain a consistent temperature throughout use, preventing my work from being disturbed due to fluctuating temperatures. The tool heats up rapidly, saving my time and energy. One downside is that it is relatively expensive but the high quality and durability of the product justify its price. Overall, Metcal STTC 19See full review