I like wireless, but I already bring a shedload of gear to gigs. IME the more gear you have, the more scope there is for things to go wrong, and I have found wireless particularly flaky in the past.
I'm now trying the Smoothound unit, largely because it's tiny and it's very, very simple. I have two gigs in the next two weeks and I'm hopeful that this will deliver for me.
Something I haven't worked out is using wireless with a pedal board. I only use a tuner, which of course I won't need to stomp on midway through a song. How do you benefit from wireless if you're tap-dancing on fuzz and octaver pedals?