I've owned two. One was whisper quiet, the other I couldn't get to stop rattling.
I know it's a low flow rate filter, but the actually flow might disappoint you (never measured it).
They fit a good amount of media in them and can be set up however you like, so pretty decent as long as you don't get the rattle issue.
I suspect these have a lot more in common with the Aqua One Ocellaris 400 and Oase Filtosmart 60 than you'd think...