Gold Supporting Member
Having owned Helix, Stomp, Stomp XL, FM-3, Atomic, Headrush, and Kemper, I can say that I can get great tones out of all of them. You're not going to have any "OMG - this is the holy grail of tone!" moment from the Fractal. I think the real question is what features, effects, and user interface you gel with. If Kemper's interface seems intuitive for you to use and you are used to it, I'd stick with that. If you're someone that gets frustrated with settings and details and just wants to play, Fractal is not the way to go.
That’s dependent on the user. I’ve had multiple experiences with exactly that time and time again.