I bought a B.O.B. – (Body Opponent Bag) last week and have really enjoyed training on it!  It has a lot of great uses, applying the rear naked choke and various techniques you really can’t use on a heavy bag.  I would’ve never thought I would be punching something that I paid $250 for.   I would recommend this tool to anyone wanting to improve on their martial arts ability.  One thing I wish I did was get the full body B.O.B.