Drove one for four months, traded it in quick when my baby was born and the car seat wouldn't fit. Here are my thoughts:
I had a 2012 Focus Titanium Hatchback in Sterling Grey Metallic w/ the Parking Technology Package, Navigation and the Tuscany Red Appearance Package.
Overall this is a fantastic little car, although it does have some quirks. I drive Fords exclusively, and this was my 3rd Focus. I've owned one of each of the body styles, and this is by far the best one. The interior is roomy for its size, and the hatch back area has a decent amount of space for some heavy duty grocery shopping.
The parking technology package is pretty cool, and the active park assist (where it controls the steering during parallel parking while you control the gas) works fantastically. The only downside is that is can get you into a spot that you can't get out of, it's that good. The rear parking sensor and rear backup camera work as expected, and work well. The front sensors take some getting use to. They do not work for low curbs, so you can still easily scrape the underside of the front bumper. They will also go off in places like a drive thru, or if a car or motorcycle comes close to you at a stop light. I found that the utility outweighed the annoyance.
The transmission is not that of a typical automatic, and therefore it does not perform or feel like a typical automatic. If feels much more like a manual as it shifts. When we had ours we experienced some hard shifts such as those that have been widely reported. They never felt in danger of harming the car, they just weren't what you'd expect from a typical automatic. Ford recently released an update to the car's various computing systems to address this, however this was after I had traded mine in, so I can't speak to its effects.
The MyFord Touch system is slow and buggy, especially if you pair more than one phone to it. Sometimes it will get confused as to which phone is currently connected and you have to fiddle with it. Ford released a major update to the system in March, but I didn't install it before I got rid of it, so again I can't speak to the outcome. I never used the navigation voice directions, but I was thoroughly put off by the maps. They road labels are ****** and you often can't determine the name of the road you are approaching until your right on it. I don't know if this was addressed as part of the update.
I hated the smart key. It didn't fit my personal usage and as a result could be very frustrating. To unlock both the driver's side and the passenger doors you either had to use the remote, or unlock the drivers door and get in to unlock the passenger door, or touch the rear door handle to unlock all doors. I found it fiddly and obnoxious. However, if it is primarily going to be driven by just you without passengers the fiddly-ness that I experienced is irrelevant.
The Tuscany Red interior is gorgeous, I absolutely loved it.
It really is a great little car. If my rear-facing infant car seat had for behind the passenger seat, or of it had middle seat LATCH points I would still have it.
So frustrating! It rarely get's anything right, and the menus are a PITA to scroll through. It's very unintuitive and whoever designed it should be fired. Sometimes it takes around 1-2 minutes for the system to "boot up" which is ridiculous so I haveto listen to a CD or radio. 
