Jonwrote a review of Shimano Ultegra SL RD-6600-G Rear Derailleur on February 27, 2009
This is a sweet rear derailleur. I had a DURA-ACE prior to it and I don't even notice the difference between the two. It shifts like a dream and I have no complaints after 1,000 miles of racing and training. The new pewter color looks great on dark frames too!