Playing double rehearsals, fast repetitions seems more difficult than on an average grand piano, in this respect the keyboard challenges your technical capabilities. It becomes necessary to adapt, sometimes notes are skipped, unfortunately this is true, I do not know if it is possible to fix it, but the difficulty with repetition of one note is the main feature. If you adapt on this keyboard, the advantage is that it allows you to switch to real acoustics and be prepared.
And it's also very well controlled, for nuances like pianissimo it's very good.
To summarize, the keyboard is good for preparation, but for concert and performance I would prefer a lighter keyboard.
This is an interesting and accurate observation. While I don't have the technical skill to be bothered by the slightly more difficult key repetition on the N1x, I do notice that when I switch to an acoustic the familiarity and ease of playing is there. It's like the N1X is great training for the real thing. The opposite it also true. I have a Yamaha P45 in my office at work and I find it very uncomfortable to play. The action is way too light and the key return is way too fast. Sometimes I end up playing repeated notes by accident. The N1X action can be counterintuitive to inexpensive folded actions, but great conditioning for acoustic pianos.
If you turn off the internal sound and play only through external monitors, then the space of sound and connection with the keyboard are immediately lost. So I found my own option, the combination of internal sound and external monitors with pianotheques is the best experience in my opinion.
I have attached a small video from my phone, this is just a keyboard game in different registers and techniques. I'll post some performance later. ;-)https://drive.google.com/drive/folders/1d7WxVqudAO_x_cED9QZzxIcJ94ZpOy6B?usp=sharing
Another great observation. I always keep the internal N1X speakers active to maintain the connection to the instrument. Adding external monitors to the mix can enhance the bass and treble response, but most of the time I've been finding that the internal speakers are sufficient for the VST and onboard sounds. I think it's important to not bypass the internal speakers if you want the most authentic playing experience. The placement of the speakers on top and the vibrations through the instrument contribute to the illusion.
What pianoteq sounds are you mixing with the internal? Thanks for sharing.