Yeah you want to get one with a warranty but they are not that bad. Its just the repairs are expensive. I don't think it is any worse than most 5 series. But it is about 3 levels up in terms of car. Everything you touch on these oozes quality. Move a lever, open a gas cap, release the cupholder mechanism... it all feels extremely well-oiled. A 7 series BMW feels rough in comparison.
You just nudge the door shut and see the motors pull it in, you sit on the back seat and the sensor automatically raises the headrests eletronically. You press the tunnel button and the windows and sunroof all close and the cabin filter activates. I never smelled anyone's exhaust fumes. You roll the windows up and the 2 pane glass isolates the whole world. You lower or raise the car with a press of a button in the car. Go above 55 and it lowers itself. Press a button and a motor will open *AND* slowly close the trunk. There are no cheap materials anywhere, there are no screws to be seen. The paint job is 3X better than on any Japanese car I have seen to date. The Active Body Control keeps the car level on mild to modest turns. You are turning, but not leaning... The rearview mirror is motorized with memory, the headliner is alacantara. Lock the car up and it lights up all around itself with the fog lights, the rear plate lights, the downlights from the signaling mirrors. Touch the door handle and it unlocks. There is small "mood lighting" that gently lights little areas in the car at night. Your feet... the cubbies and compartments, the doorhandles. I can go on and on. There is a reason this car costs 125-135K. When you own you will see there is a lot of "car" here. Mine was the most comfortable machine I owned. I felt better getting out than when I got in.