My Xvives survived 2 years gigging in 2 bands, plus home use, before the casing came apart on the transmitter.
In use, the only issue was the interference caused by the guitarists wireless. Swapping channels, for both of us, did not always sort it. His more expensive system never had the interference.
These are what I bought when my Xvive transmitter died. Great (recharge) battery life, but the loss of volume compared to a lead is very noticeable - for me with both bass and guitar.