I've had it, but it's not working that well for my DT who uses evasive this season. I think power tackler might be a better investment. I'll probably take 5 out of the 10 from heavyweight and move it to power tackler.
My level 53 DT uses Heavyweight and does well at putting linemen down on the ground. Remember your DT has to break the block first before he gets a Heavyweight roll, if your DT is not breaking the blocks, you will never knock them on their ass. Not saying that is your case, just saying a DT will never get a roll if he doesnt break the block first.