When I saw that Mark was using a modeler, I thought it was strange that he went with the Kemper. Not that the Kemper is bad, or worse than the helix, but the helix seems more flexible in terms of live performance. Then I thought about it, and I bet Mark has a pretty substantial collection of amps. And I bet he likes each and every one of those amps for various reasons. And as great as the helix is, the helix doesn’t clone the exact amp sitting in marks studio that he’s been using for years. The Kemper does. So yeah, the helix(stomp) is more than good enough for me. But for the Pro guy with 10’s of thousands of dollars worth of top shelf amps that he’s been playing with for decades and knows intimately but doesn’t want to cart them around, the Kemper makes sense.