I recently bought a Line6 Relay G30 to connect my bass and I am very happy with it, it is such a fun to have total freedom to move around!
Two issues though with the transmitter (from many forums out there, looks like common issues...) : after only a couple of utilization, one of the two plastic parts that holds the belt clip is already almost broken & the side cover for the batteries is looking like it's going to break soon...
Fortunately, I know a musician craftswoman in the Swiss Alps - see https://www.blackdust.ch - she crafted a super custom leather case for me (see photos), my G30 transmitter will most likely last for a lifetime now!
Hope this post may help other Line6 Relay G30 users in Switzerland!
@Line6: maybe an area to consider for future improvement?