So about half a year ago i got my first blue laser from SFLasers. It was the 445Nm 2.7Watt Laser. It was amazing! But one day it stopped working. I contacted them and we sorted out a replacement. It took almost 3 months to come as something went wrong but it came and im happy! Customer service is amazing and so are the products! Im thinking of getting a new laser soon as im so pleased with my last one! I would rate SFlasers 8.5 out of 10 just because the replacement took a lot longer to come than it should have.