A friend of mine bought these a while back, wore them once, and decided that they did not fit him. I took them off his hands, and they fit me like a glove. Best fitting shoes ever. I play mostly on hard courts. I used them THREE TIMES, and the heel started to detach on both shoes (see pic). The adhesive failed completely. This model has the RG (Reactive Gel) insert, which you can clearly see exposed in the picture.
As I did not pay for these shoes, I have incurred no losses. I am posting this as a warning to others; don't assume a high-end shoe is well-constructed.
I am also disappointed because the amazing fit of these shoes could have made me a Wilson customer for life, and that's not gonna happen now.