There have been many thoughts about this subject, some say that it is hard on tranny.
Myself I don’t see why if used right.
The other problem some have is the room for their boots.
I ave one on my old Valkyrie and 85000 miles later no problem.
As long as you get one that is well built with no slop you should be OK, now you must also
Make sure that when you shift make sure you mean it and don’t get lazy.