I haven't either. As I recall, the rerouting technique was developed or at least popularized by Sheldon Brown as a fix for a specific problem; making 8-speed Dura Ace rear derailleurs with their unique geometry work with other Shimano shifter models. It has since been recommended as a nearly universal cure for every and any shifting mismatch and I can't believe it is that versatile.

I do know from a lot of personal experience that Shiftmates work and work very well. They are not a near-miss, they work exactly as advertised.