If your horse just needs a distraction its a great and inexpensive option,
If one cannot work on the issue, sure! It's far better than the horrible nose twitch.
Had a horse extremely fidgity to clip, tried to kick me once or twice clipping by his rear legs too. Put the duct tape on and after a few minutes he was completely complacent. Worth a try.
MY ferrier used it on one of our horses. It worked really well but It did not do anything for the training in the long run. It is a great tool for in the moment
I've had it work very well for horses that can be a bit fidgety or playful with clippers or braiding! But it will not make much of a difference if your horse is truly protesting.