I'm using a Freezer 7 Pro Rev.2. It's decent but it started making noise this morning, I think my computer spit out a twist-tie while I was sleeping; it may have borked the fan a little. It's still spinning, and the noise slowly subsides as it warms up, but it's still disheartening to hear a one day old fan make the same noise my three year old ones used to make before I replaced them. The Freezer 7 uses a fluid dynamic bearing, which should last a long time; the thing has a 6 year warranty. I guess if the it gets any worse I'll just get a replacement. Perhaps I can just replace for the fan, it's pretty easy to remove, in fact you have to take it off to install the sink.