NC user here.
Background: I´ve had/used live Zoom G5n, Atomic Amplifire12, Helix LT, hybrid rig (real amp, analog pedals with Zoom G1XFour for effects), Mooer GE250 with my own MNRS profiles of my rig... and now the NC with analog pedals and a Boss MS-3 for switching and effects.
I´ve tried every profiler (but the original, Kemper, which I´ve heard many times because several mates own it and gig it). Tried GuitarML, Mooer MNRS and NAM profiles.
What made me go to the NC?
1 - I was not fully happy with an ""FRFR"" on the stage. For stage monitoring in a gig, I discovered I VASTLY prefer a real cab behind me. Not necesarily a real amp... but a real cab.
2 - I was not willing to spend 1600€ in a QC and dealing with a few details that I don´t like of it. If I´m going to spend that money, it´s got to be perfect for my needs. Those cramped switches kill me, seriously.
3 - Kemper is not the best capturing device anymore. It´s old... spending that money in something that´s already dated is a big NO for someone with my economic limits. I don´t doubt it´s great, because it is. But it´s been surpassed.
4 - The NC has on-board profiling (which NAM or ToneX don´t have). That´s a guarantee for getting the input gain correctly set in every profile, coming from anyone. NAM is great, but the input gain is the worst enemy if you are after accuracy. In the NC, I just load any profile and inmediatley feel it´s good to great. Not to mention that if you load any Amalgam profile you already are enjoying big time.
5 - I didn´t want, at this point, a full all-in-one unit with all the footswitches and I/Os because there is none in the market that ticks all my boxes... so my only chance was to find a small unit to integrate with my rig. And... I really think the NC is perfect for that. I just need a few reliable captures, a few knobs, good hardware, MIDI, low consumption (avoiding the need of a separate PSU). And it works great for that. I can reliably profile my different rig setups, with very little mistake chances in a couple of minutes... and I don´t feel it different from my NAM captures, actually. Yes, I´m sure there are differences, but I just enjoy my NC captures the same (if not more) as my NAM captures.
6 - As a bonus, it has a few effects (which I find fastastic, by the way). And, if everything goes as expected, it could even have more effects and flexibility in the future. Don´t need it nowadays, but if they arrive someday, it´ll be great.
Don´t buy the NC if you´re after a complete and flexible unit. Don´t do it if you swear for the absolute maximum best of the bests amazing super yadda dadda capturing tech. Don´t expect it to get there either. If you´re OK with its limits and the features it packs CURRENTLY, then its quality will satisfy you.