They may help Gil, but I can't say as I've never used them. However, if you have a friend or if there's a serious target shooter at your club that would stand behind you and look over your shoulder they will be able to tell you what you're doing wrong.
One of the most common questions I hear from my shooting buddies, all of whom have lots of experience, is when we ask each other, after two consecutive misses on a presentation, "Do you want to know where you're missing?".
If lighting is right I can often see the shot cloud in the sky and it's relationship to the target.
