If you have long legs and always feel like you need to stretch your legs out more when you ride, then you will love the forward controls and they are worth every penny. If you aree comfortable riding now, and just want to be able to stretch your legs out every now and then, get highway pegs instead, or crash bars with highway pegs.
I put forwards on one of my Intruders, but with my legs stretched out I did not sit as upright, and my back hurt...I took them off after a couple weeks and sold them on EBAY. I bought some MC Enterprises highway pegs instead, which bolt on without needing crash bars. I have not installed them yet...