Very true - had an issue on stage last night with my helix cutting out, happened in the first song, came back to life somehow and then went again in the second song. Couldn't risk going any further with the Helix, so I quickly grabbed the Behringer BDI21 out of my leads bag and on with the show. Love the sound I get from the helix, and was gutted to have to switch to the Behringer. Didn't really enjoy the gig after that.
I then listen to phone recordings today (with headphones) that the Mrs took, featuring both the Helix and the Behringer being used. The BDI21 sounded just fine out front!