Works as described. I only ramped it up to 300psi but it seems to be working fine. The packaging was new and there were no defects in the product that I saw. I removed the bell and put in my own and the thing was very tight. With the help of a vise and a very large wrench, he loosened it. I had to disconnect it from the tank because I quickly realized it was too tight to remove without a vise. I use it for CO2 and it seems to work. No bad aftertaste.