well i got my lake wood traction bars for less than 80 brand new and love them. they won't work for 4wd because of the lift blocks as Matt guessed ( i had blocks on my truck but had to remove them to install the traction bars). A few people on this site run them, the only person i can name (off the top of my head) is D. The bars are really simple to install and uninstall (remove rear tires and tighten 4 bolts) but may take time to adjust them to liking. i believe the JD bars require drilling into frame
if you are 4wd i would go with teh JD you will probably be happy with them.
i went turbo.. Build Thread
then i broke turbo.. revival December 2010