The was the most powerful OpenGL card that would work with my 300w power supply. Build quality was good and the product was well packaged. Bought mainly for twin monitor support and for use with Blender, the 3D modeller. Also to get Compiz / Cairo eye candy and the option of the Gnome Shell desktop.
Twin monitor function works fine and resolves two different display sizes impressively.
However, what I am having problems with, is the HDMI sound chip on the card. After installing the Nvidia drivers I found the HDMI driver conflicted with my existing on-board intel/via setup. I now don't have any sound and am still trying to resolve the situation at the moment. It seems to be affecting me due to the on-board chip being a via vt1705. The Linux/alsa drivers are causing the conflict. Apparently, a patch is being released.
No problems (with the card) in Windows 7.