Main drawback- built-in speaker does not function
However, the 1/4" aux port underneath does function. with the 1/4"-1/8" aux adapter I have in it (included) you can plug in any external speaker or even headphones to play.
It is definitely an old organ and has some issues, but it still plays.
Has original manuals and even the original warranty paperwork, so you could go through the manuals and fix any of the wiring issues if you want to. I just never had the time.