I havent' used it, but I know it was designed for CAD. But it's old and isn't much better than a TNT2 Ultra at Pro/Engineer.
Here is a link to some benchmarks by Anandtech.
If you are interested in CAD I would go with a Geforce2 MX. It's cheaper and as you can see from Anand's benchmarks, T&L is very important for CAD. The TNT2 and the VX1 don't have it and perform poorly compared to cards with T&L.