I had the SCSI version many years ago when you could buy them new. Although it did work the drive VERY unreliable.
I seem to remember something about the Amiga's printer port not providing the proper signals to allow the parallel version to work. The SCSI version didn't need drivers and as I recall you could even boot Workbench from it. All of mine died from the dreaded "Click of Death". Syquest warrantied the first 2 or 3 of them for me.
-J