Our Cubix has a love/hate relationship with us at Babs Do Productions. Sometimes it will just stop working and I have to reset the BIOS or re-insert the interface card to get it working on our BOXX workstation. Now, this could be due to several things, I'm thinking it's the funky BOXX computer case that feels slightly too tight for the motherboard and expansion slots, but it's not too big of a deal to fix. Other than that, it's absolutely awesome! It runs a Quadro 6000 and AJA Kona 3G with ease. I've been considering one for my Mac Pro but it's a 2007 model so may not benefit as much under OSX due to the lack of support for nVidia cards beyond the 8800GT and old Quadro 4500. We're definitely keeping our eyes out for alternatives and new PCI Express expansion options (ie. Thunderbolt) but I don't think anyone could go wrong with any of these.