I owned the Kemper and three versions of the Axe FX (Ultra, II, AX8) and did the Helix Native demo. I enjoyed the II the most, and it let me approach modeling like I would any normal rig. I simply choose the amp and cabinet I want, voila, sounds good. I tweak from there, but it seems like 'all noon' on any FAS model sounds good. Kemper was a rabbit hole of chasing down the newest profiles, a constant sort of social network around the product that keeps you second guessing what you already have available. I'm bad at "set it and forget it", and Kemper set those tweaker tone-chasing ways of mine on fire. The AX8 was a failed product for me. I would constantly run out of DSP with what I thought were simple setups. Helix Native sounds great, but the GUI is awful, although intuitive for routing. While stock settings/all at noon works for FAS, it does not work for Helix. The knobs are setup much like the amps they models. For example, it's common to turn down bass to zero on many Marshall amps. You basically have to do something similar to that on Helix. I set up a Plexi or JCM800 model fairly close to how I would approach the knobs on the real amp, and and it sounds great. This doesn't give you as much room to tweak and craft a brand new sound, especially since the Helix parameters do not go as deep. It also means that if you decide to chase a sound with an amp you are not familiar, you sort of have to figure out the particular characteristics of that amplifier, where with FAS models it was simpler for me to get the sound in my head because I always had the same basic options to tweak, and understood what those options did for the tone. I just found the II constantly inspiring to play, and the most simple for me. I got rid of it because I was tired of looking at a $2000 practice amp since it never left the home, and was chasing down another path exploring the Suhr RL/Fryette Powerstation possibilities. I'm ready to go back for my fourth Axe FX.