I did own this car and brought it up to 325,000km. The TDI Diesel model is very fuel efficient and extremely reliable. I even used it in Quebec's winters down below minus 30 degrees in the morning and never had an issue starting it without having a block heater. I enjoy this car, travelling across Canada from Quebec to Vancouver a few times with my family. I personally prefer diesel compared to hybrid because they they offer comparable fuel economy at a lower cost. Maintenance cost was limited to timing belt every 100,000km (500$ expense) and usual maintenance like brakes and sensors. I also had problems with front windows and engine lights coming up often. Good car in general.

We own this car for almost 2 years. We bought it as a certified vehicle and had no major problems, only the xeon front light had to be replaced just after the warranty expired, a $250 expense. In general we are satisfied with this car. It is comfortable, performant enough and safe, my wife drives it most of the time and she likes it. It is very expensive on gas though, around 14l/100km average which is a lot for this type of cars, and this is not because we drive it very fast or anything like that. Sound system is great and comfort is excellent.

I bought this car in 2007 and own it since then, I had to do a few repairs, nothing major. I like to drive this car, performance is fine and driving experience is good.
BMW did a great job with this sport sedan combining convenience with an excellent driving experience.