I have had it for a few weeks. Haven't played With it too much. Not in love with the action. Hate the Leslie and CV is awful. I kinda like the acoustic piano.
I've been using it as a lower manual for a NE5d. It's good for that. I usually end up using the Nord for piano. Even though it's midi to the Nord, I only use the 2x for piano if the song absolutely needs the extra octaves. I actually like the Nord action better. Just a personal opinion.
Overall, with the little I've played with the Numa, it's ok. Not super impressed. Obviously, YMMV