As a professional welder in stainless steel constructions, water pipes, gas pipes, and high-pressure pipes, I have worked with many machines, and currently, I am working with this one. I have to say the following: Yes, the machine is the best I have worked with in terms of durability. Yes, it is a high-quality machine that will never let you down. Yes, it is user-friendly, but it has many major flaws compared to other machines that cost a quarter of its price. It does not have the tendency to join the metal but rather to create holes, which is not suitable at all for welding purposes, as well as for welding with a rod. It does not have a stable arc, resulting in uneven welding. The clamp is not of good quality, it heats up easily, and it is sensitive in all areas. In no case can you work with it without a cooling supply. The most important thing is that the machine quickly loses its performance after two minutes of continuous welding, even at 150 amps. It is not worth the money at all. Maybe 15 years ago it could have been the best, but now it is a machine that remained in the old technology with an unaffordable price. Also, in terms of pulse frequency, it does not have many options, and it should be noted that no other clamp fits except for the Kempi clamp, which has a high price...