I plugged my iPhone direct to the board at a gig yesterday through an iRig interface. I selected an Acoustic 360 simulated amp and it sounded pretty good. As good (or even a hair better) than my Aguilar Tone Hammer DI (which still sounds amazing IMHO). I was pleasantly surprised. Does anyone else run this type of rig live? What are the major concerns with using this a live gigging rig all the time?