When I had mine with a TRE, it didn't fail as such but after about 12 months of having it fitted when I put the bike on the side stand with the engine running the FI light would come on, restart and it would go off. Every now and then the bike would cut out when rolling off the throttle at lights and junctions etc, thought nothing of that after all its a big twin with glitchy fuelling low down.
I removed the TRE to rule out the causes and the FI light and cutting out never happened again. Bought a new TRE a few months later, all good.