I had a 0,5W laser which broke down, so I was looking for a new, stronger laser for my Makeblock XY-plotter 2.0. George really helped me out by answering all my questions very patiently. The laser itself is very very powerfull, allthough we only use it for engraving (not yet for cutting). So I am very happy with the laser, and I was even more confident with the help and assistance I got!