I work for a place with 3 Nt machines ,nt4300 and 2 nt5400. I usually work with the 4300 myself, great machines. We run most parts from a start to finish. The "red hed" of mill is very flexible.
The tooling is unique to the series, I am not sure what brand but the holders are triangular shape. We can't preset any mills because everything else is setup tapered holders at work, but its not a big deal. Im sure they sell something be we don't have it.
You can program right on the machine, it will show 3d displays of whats going on. And the accuracy and repeatability is the best i have seen, it holds tenths.