I don't want to use one because I want it to correct some problem, make him stop/steer etc. I want to get one because he moves well off my seat, legs, and reins but I want to take him a step further. I have heard that they can be harsh but it seems to me that they would be relatively mild in the right hands because the mouthpiece can move around.
Just my own personal preference, but if I choose a bit with a harsher style of mouth, I like to keep the shanks as short as possible.
As far as correction bits go, I like the look of these not only because they are short shanked, but also because they have the extra ring for reins if you want to make it into a snaffle pressure ratio... Amazon.com: Double Rein Correction Bit: Sports &..."> Amazon.com: Double Rein Correction Bit: Sports &...
Check out smith bros; they have a high port from Tyler Magnus on sale that is similiar to a correction, but it is slightly milder -- I use one for my head horse when roping, it really helps keep the shoulder up and can really enhance the stop -- "if" the horse has been trained to stop correctly.
Thank you very much beau159 and ropinbiker, I will take a look that those. Ropinbiker- you said exactly what I want to achieve with my horse- help him pick up his shoulder better and to stop with his shoulders up- not to teach him how to do these things. Also beau159- again what I was hoping to achieve with my horse- only very light contact needed to communicate (especially at shows).