I used the NX1 for about 4 years and did numerous paid gigs with it. the footage from the camera looks top-notch when it's lit well. but I really got frustrated when I had to shoot in situations (run and gun) where the lighting wasn't ideal. the footage starts looking really muddy. and with the type of work I do, I needed a camera that can handle above ISO 800/1600.
to me the X-T2 is a great replacement; great skin tones, internal 4K on an SD card, and the price is not too high. but I do miss how the NX1 feels in your hands. that was perfection.