This is a very old MIDI keyboard that my dad had in the 90s. For me it's been very useful; both as a MIDI controller and a MIDI Keyboard for drafting. It is much older however, and requires a MIDI to USB cable for its connection to the PC or Mac. It also doesn't have weighted keys, but is still useful for electronic productions.
My mom had one in the 90's. Keys are the worst i've played. It had some few really good drums, pads and strings, usable even in professional productions. No stereo ouput, only a hella noisy headphone out.
Here is tha grandmaster keyboard that i use to send control MIDI messages into sequencer to play sounds prepared on MPC. very poor quality of keys. And does not support aftertouch.