I made my first purchase a few months ago. It was a YZ-01. It came packaged very securely and properly. The shipping time was about 2 weeks which is what was expected. The laser has worked very well and the battery life is long. The only problem I had was the beam expander lens came loose or popped out of place slightly, but I was able to pop the lens back in with spring ring holder. The seal is very tight and when you move the beam expander up and down, and I think it exerted a little too much force or a vacuum of such that it popped the lense loose. This is something I'm going to keep an eye on. Overall, I am very happy with the purchase, and I highly recommend this laser. I am looking at the KX series now or a 260 possibly.