This is awesome. My primary use case was to experience the soundtrack of Castlevania on X68000 in its fullness. Is that overkill? Yeah, probably. Is it still awesome? Yeah, it's awesome. It sounds glorious.
Assembly isn't too bad. If you put together your own Mister you probably won't have any issue. If you havent assembled a stack like this you might be a little lost at first but it's inconsequential and simple to reassemble.
I put together this unit using a Raspberry Pi 3 Model A+. A 2024 board I assume, as it would not power the MT32 hat. It was pretty simple to fix. Per the instruction on the product page, you just need those two files replaced on your SD card. Simply Google the file names and download them from the GitHub repo. Fixed.
This thing is definitely a luxury item that gives your Mister setup a vague sense of completion. And it sounds good. Not necessary but worth it.