Reason I changed was I getting a bit of shoulder pain with the stock bars, I found that I was raising my shoulders and elbows when riding , swapping to the lower bar has allowed my shoulders to relax more when riding , no subconscious hunchback impressions now.
Took a bit of fiddling to get bar lever/cables set up but its still on the stock brake hoses so that's a plus. I found you cant roll the bar angle back too far as the tank clearance gets worse and forces the levers to be run at a flat angle which isn't good for wrists.