Originally Posted by AlexS
A lot of people seem to think that the heel should be inline with the hip, I believe this to be inaccurate, and for you to be correct.
It depends on the style of riding. Some styles put it directly under the hip, others under the belt buckle, and others further ahead. A pretty good guide is if the stirrup leather hangs straight down, and your butt is in the right spot on the saddle. Then you are riding without tension in your leg moving the stirrup.