the 30w Gpro mopa fiber laser is nice, setup good, instructions was not so good - had to watch youtube an use Zadig software to get pc and laser to talk to each other, it took 1.5 days for this, using lightburn , I,m 64yrs old and still learning , LOL, your after service help is real good . thank you replying to my Emails. I can only give you a 4 star now because I have no experience with this type of laser . Darryl Whitman,