Sorry to say but I didn't like the sounds. Kemper and the Axe FX play in another league, although I don't like them either. Played a Kemper once...
Anyways, I was one of the first to gig with a Line6 amp (Flextone 1). Still got that amp, still sounds amazingly natural. After that all the Line6 crunch and distorted sounds were changed and didn't convince me anymore. The Helix seems to be programmed after the same "bad" software genetics.
"A lot of people in the industry want to blame downloading for the state of the business. But I think if most music wasn't shit to begin with people wouldn't be downloading it for free," - Corey Taylor (Slipknot)