This is probably for the women. But I find that for me girth matters more than length. I don't care if it's 4 inches long, as long as it's 8 inches around. Okay, maybe not not 8 inches. But you get the point.
I find the men tend to "bottom out" very easily, especially in certain positions. Maybe it's just my body structure. But even if you have 9 inches in length, you are only getting about 6 into me.