I wholeheartedly agree that with Tridef it is very hit and miss, sometimes it works great, quite often not so great. There are bugs in the Tridef software also and the moderators of the forums there have no idea, I brought an issue to their attention and they gave advice back that was completely irrelevant.
With 3D Vision however the experience is much better. I admit there are still situations where you need to do certain tweaks, fixes etc but in general it is a lot more problem free. The 3D effect is much better, in some games with Tridef i notice a lot of ghosting, using 3D Vision on the same games little if none at all.
This is with using the same monitor by the way, the 950D, i'm not using a different monitor to use 3D Vision to make these comparisons.
Generally people aren't aware that you can use 3D Vision with this monitor, thinking they are limited to Tridef/iZ3D.
A simple hack was released where the Nvidia drivers can be tricked into thinking the built in emitter of the monitor is a 3D Vision emitter, thus enabling the 3D Vision portion of the drivers.
This does however require a Nvidia graphics card of course. I tested this monitor on my friends GTX460 SLI setup and have now bought a GTX 570 from Overclockers which i'm eagerly waiting delivery of today