the idea would be to use the flash or drop to settle a green or young horse - then move on to a simple cavesson. Whatever noseband, it should be a training tool to help correct a fault or certain behavior -- i'm not advocating that you should always use a flash/drop, rather, that it be used temporarily to encourage a solution. My arab, for instance, holds her head high for trot and canter. It is how she naturally moves her body, but it does not mean that it is the most efficient way for her to move her body. It feels comfortable to her, but in dressage, well there are standards for how a horse should look while moving. So i used a chambon, that applied pressure on her poll if her head was high, but released the pressure if she lowered it. No, it wasn't necessarily comfortable for her, but it provided a temporary suggestion of sorts to teach her a new way of moving that would, in the end, strengthen and tone her body in a more ideal way. I would never use it all the time.