Anyone ever used a slam man???

I have just brought a slam man really cheap and pick it up in a few weeks and just wondered if anyone has one or has ever used one and are they any good. Its the one with the flashing LED lights on and you have to hit them to put them out. I thought it would be better for working on fast combinations and reactions rather than my heavy bag. Also being a kickboxer rather than a boxer I can use it for kicks cause it goes upto 7ft tall and I keep kicking the chains on my 6ft bag!!