I have them on my HD700 and the are a nice upgrade in total sound. Much clearer highs and mids and the bass tightened up too.
Only thing that is not huge but a bit of a downside is they are heavy compared to stock and the WW cables are very lite in comparison on other cans I own.
But if the cans are not portable and are home or office I say they are a great for the money investment upgrade. Bang for the $$$ is IMOP better than the WW cables. BUT think for cost no object then go WW top not etc.
Drew makes supper nice cables, I won a lot of his Dragon cables, even for my Oppo to Ipod etc
