FWIW I used(d)* a set of WS-50 at rehearsals and live for about a year without any problems at all. Rehearsal room is probably 60-70' foot long, and live venues are small UK pubs in the main. I could walk from stage to sound-desk and keep playing no problem at rehearsal, and would regularly go out front at gigs to check balance and levels during soundchecks, walking all around whatever room we were in. Never had a dropout, never had an issue with latency. This is running through a conventional pedal board into an amp/cab, no modelling.
I've had more issues with the comparatively posh and expensive Smoothhound wireless I was using before.
*They're still in use now, as I bring them to gigs for the singer, and he's had no issues either. Unfortunately my hands are still too buggered to play guitar, so I'm relegated to keys, where wireless really isn't an issue.