The main selling point for me was that it is velocity sensitive with 3 sensitivities.
The build quality is very good for its price and it feels good when playing, although the keys themselves could use some reinforcing but they work fine without flexing downward.
It is plug and play without an interface or extra dongles, just a USB B (I'd love it if it were Type C but that's nit picking).
It has 2 knobs for pitch bending and one that changes the tone of the sound (I think). The most handy feature is the volume slider that works like a volume fader out of the box with garage band.
I'm honestly very pleased with this purchase, cause now I have more access to unique sounds, and can express better with the sensitivity, all while using half the space if my old synth and looking nice on the desk