I use it for a few reasons, mainly to warm up, but also its a fun arm workout. I do notice my hand speed improving a bit. Also, I pop jabs/straight fights at it, and try to slip the bag on the return. Just curious what everyone else does.
I do use it - it's an integral part of my boxing routine. About three times a week, 3-4 rounds per workout. [ame]http://www.youtube.com/watch?v=EOyhizBQLqw[/ame]