I have been using the Helix rack unit now for about 6 months in more of a preamp fashion with a Koch 45W stereo tube amp
with a Wizard 2x12 cab. These two pieces of gear have replaced a rack full of effects and two hi quality tube amps. (Wizard & Fargen)
It took about two months of learning and programming to get the basic group of tones I need for a typical gig.
We do Classic rock 60-'s thru 2k so a wide array of tones is needed.
So far, the Helix has stood up to the challenge. Excellent dynamics, great workable tones that are easily edited on the fly,
and simple one rack, one cab setup. I believe I'm about 85% convinced it can do the job really well. The remaining 15%
will wither away with more tweaking and broader application of the features.
One piece of advice.....Study the tones from the Line6, Customtone site & guys like Glen Delaune & others to fully understand
how to structure a tone. They are very good starting points and reveal how multiple paths work.