I couldn't, respectfully, disagree more with Walter. I'm happy yoke works well for you. I on the other hand want more out of my equipment. I have yet to see configurations set up for deeper diving that don't use a din application. As for cross threading the male into the female, you have to be smarter than the valve! The only exception for useing a yoke style would be the budget minded fellow, through lack of experience and or knowledge, who put together tanks so he could join the party. For those of you who fall into this catagory, I'm not picking on you. I genuinely feel din is safer. Have you ever been with a group of divers assembling equipment and you hear the continued rush of air. More times than not it's an o ring to yoke failure. Does the o ring stick to the din female, or fall out, some times, Yes! It happens with yoke as well but nearly as often. Is a din valve more expensive, Yes! This is one of those preference things, long hose/short hose, independant doubles/manifolds. I'm not here to make you change. There are obvious saftey reasons to use a din system. The Yoke system has been around forever. A humerous example, ( not to be done in reality ) would be to go to 200feet on an 80 cu.ft. tank. Could you do it, yes! Why would you, when you could go to 100 and stay longer, do it safer, and feel more comfortably about it. A din sys. will capture the o ring better! It's profile is lower and dosn't have that knob sticking out to get hit or caught. Din allows you to use either din or yoke, with the insert. It's your money, your decision. They are different for a reason, look on any web site and find out for your self. Don't take my word, or Walter's for it, research it!