I have one of those, very basic. It helps if you have previous welding experience with thinner material. With only two amperage settings it is easy to put too much heat too quickly thus blowing holes. Variable flux wire feed rate can overcome some of this but experience and Youtube videos can help. Have been watching Full Custom Garage show on TV where fabricator Ian Roussel does amazing things stitching the sheet metal bodywork together with a wire feed. Quick pulses followed by a cool down pause seems to be the key to success.