I ran the GenMar riser for about 2 months. It comes up 1 inch and slightly back due to the angle of the stock riser. I found that the original setup was OK for twisty stuff as long as there were few downhill turns requiring significant braking. Under those conditions, the wrists and forearms get pretty pumped up pretty quickly.
With the 1" riser, the downhill turns were less of an issue, but it turned out that I found myself taking one hand off the bar and rotating slightly back to feel more comfortable for straight line riding. After experimenting, I discovered that what I really needed was to have the bars back another 3/4 inch. So I just sent the GenMar riser back to swap it for their model that comes up AND back. Looking forward to that setup. GenMar was very good about the swap.
...Bob