I was the first one , before any of the GB's, to get a DL 589nw 50mw. This was April 2014. I tell this same story in the review I did back then. I bought it as a 30mw. When I got the laser, I knew it was way over 30mw just by seeing how bright it was, as I also have a DL Spartan 589nw 5mw for comparison. When I LPMed it it peaked at 70mw and ran averaged 50 mw. When I checked their website 589 page shortly after, the 30 mw option was gone and it was now a 50mw for eighty dollars less then I paid for mine. I sent Adam from DL an email about this and DL gave me a 80 dollar credit, which I used for a beam expander. I then purchased a second unit for jmillers GB and it also peaked in the 70's and averages around 50 mw. These two lasers are used intensely every weekend for almost a year now and still work perfectly and are very stable units. I have purchased 5 lasers and numerous diffraction gratings from DL over the past three years and would buy from them again if there was something I wanted. Whenever I did have a problem it was taken care of to my satisfaction.