I used one for several years on an A1200, and it worked flawlessly. Multiple drives, CD burning, etc, no issues. On my Blizz 1260, the speed was between 2.1 and 2.5 MB/sec, and IIRC it did seem to decrease CPU usage a bit.
This is a great little add-on, glad to see it available again... I had to search forever to find mine.
