The S4 has completely improved my metal engraving workflow. I mainly engrave stainless steel tags, aluminum business cards, tools, and jewelry, and the quality is consistently excellent. The lines are crisp, the text is easy to read, and even very small details come out perfectly.
The machine feels solid and well-built, and the engraving speed helps me finish customer orders much faster. It has been running reliably every day without any problems. DAJA also provided helpful support whenever I had questions.
Overall, I'm extremely satisfied with this purchase and would recommend the S4 to anyone who needs a precise and dependable fiber laser marking machine for metal engraving.