I bought the wireless unit to get more liberty on stage, and it really did it.
Sound quality is just as if I was wired, and in open areas I can easily be 60-80m from the receiver without problems, which is quite interesting when running a soundcheck.
The receiver is attached to my pedalboard, while the transmitter is attached to my strap, which is to me one of the weak point : Shure does not provide a secured attach for strap-mounting, but a couple of zip ties on top do the trick. Also, I encourage you to use a pair of rechargeable batteries to go into the transmitter rather than standard batteries, just for budget considerations