I have it but up to now I have not used it for anything I have bent up. my bumper, the cage I did for my buds zuki, tube doors I have started to make. I have had no real problems bending yet. I probably will be doing a cage here soon for a 2007 Nissan 4X4 fronteir that will be running in next years Baja 1000, in the stock truck mini class and I might try and see if it speeds things up for me.
others say they it has helped alot. for the money it costs I would say get it.