I purchased this card to run in SLI with an existing EVGA GTX560 Ti I had lying around. Since my monitor is Displayport-only and this Zotac card seems to be the only Displayport-enabled GTX560 Ti available anywhere, it was the obvious (only) choice. So far I am satisfied with it, but with reservations.
The Zotac GTX560 Ti uses a non-reference PCB design and is the shortest, smallest GTX560 Ti I've seen. This makes it easy to install. Chances are it won't block off any SATA ports on your motherboard like some longer cards might. The PCIe power connectors are top-mounted on this card which can help in smaller cases, although makes for uglier cable management in large cases. Functionally, the Zotac GTX560 Ti works like any nVidia-based graphics card. You install the card, install the nVidia driver and you're done (just don't use the driver on the disk--go to nVidia's site to get the latest driver with improved support for the latest games!)
I experienced no issues running this in SLI with an EVGA GTX560 Ti, which was a relief.
So it works fine [SEE EDIT BELOW, DOES NOT WORK FINE]. Then why did I take two stars off my review? Because the cooler is *awful!* It's tiny, whiny, and in SLI mode I've measured temperatures up to 96C, which is barely in spec for the card and probably not healthy for long-term use. I wouldn't be surprised to see this card burn out after a few months at these temperatures. Unfortunately, since the card uses a non-reference design, it is probably risky to try using one of the few aftermarket coolers available for the GTX 560 Ti, all of which have been qualified for reference designs.
Also, if you want warranty service, you need to make sure to register your card very quickly after purchasing. The warranty is otherwise reasonable, allowing for aftermarket cooler installation, assuming you don't physically damage the card in the process.
I would only recommend this card if you needed a GTX560 Ti that supports DisplayPort. There are better designs for the GTX560 Ti (the reference cooler is much better), and there are plenty of Displayport-capable cards in this performance class based on AMD GPUs. But this is not a bad card, it's just not great.
[EDIT - October 12 2011]
After owning this card for a while, I noticed that when it hits 95C, game performance starts to hitch and stutter considerably, almost like it is partially shutting down. This caused games to become nearly unplayable after twenty minutes or so. The issue went away after installing an aftermarket cooler (Arctic Cooling Accelero Xtreme Plus II) which brought the temperatures down considerably. In order to install the new heatsink I needed to *physically remove* the upper DVI port because of a clearance issue. This was a last resort decision that completely voided any warranty, but it ended up working well. Reference-designed GTX 560 Ti's will not have this issue because of the port layout.
Keep in mind that ambient temperatures in my case are not excessive. As someone mentioned in the comments, the card seems to be using more GPU voltage than other GTX 560 Ti designs, which could account for the ridiculous temperatures.
At this point, I would not recommend this video card to anyone for any reason. Without aftermarket cooling, it runs at such a high temperature that it starts to glitch out. I only give it two stars because I was able to get it working properly after physically modifying it.