And I will never do it again.

I don't mind archery on horses, but anything else is awful.

It's only useful if you get lucky to time it right. I think it's not bad. As long as you time your strikes right and you're only fighting one person/creature, then it's easy. Not FUN, but it's easy and gets the job done. Better than getting off the horse with the awkward painstaking Skyrim animations like they have.