Yup. Have one, it works. Thanks to live rock, I don't really need the biofiltration so that serves as a backup for me. If you lack live rock, I BELIEVE strictly the biobale will not be sufficient, that you should have wet-dry filtration in that case like a biowheel. Thought I had a reliability problem recently, but I figured out it was only a bit of calcium buildup in the venturi's air intake. Uses an easily replaceable powerhead, so if it fails (that's really the only part that might do so) it's cheap and easy to fix.
I can't compare it to others, as this is my first. I've heard reliable information that there are better skimmers out there (though naturally they're more expensive.)
rusty