I had one on my old gravel bike, with an Ultegra 10 speed rear derailer, 11-36 cassette, 36-46 cranks. It worked fine, no notable degradation of shift quality and it had an uninteded benefit of providing a breakaway component to my hanger. I picked up a stick that wound my chain and rear derailer into a mobius strip configuration and the wolftooth sheared off, saving my derailer and hanger. All I had to do was untangle it, remove the parts of the roadlink, bolt the derailer directly to the hanger and carry on. I replaced the road link shortly after of course...
