I've seen them on a bike up in Wyoming. Give them a try, if it does the job for you down the road you can get some bars that have a taller rise measurement and clean up the look.
I use them. I have legs that are disproportionaly longer than my arms. They work good standing up but feel a little unusaual sitting down. They did reduce fatigue in my upper back and shoulders. I have raised the bars on my Honda up to two inches (just messing around) and had no cable issues.