The passenger comfort of this car is hard to beat. Quiet and smooth - I often feel like power napping between meetings! Rear windows not too small or high. At the wheel its a pleasure to drive. But it is b-i-g. Some may feel uncomfortable handling the sheer size. Too early to really say anything about the quality of the build and engine. First impression is very good, but with all the tech there are lots of things that can break or go wrong. Tested another 750li before buying this one - and it had a broken sunshade.
Excellent rear seat adjustment options and lots and lots of leg room. Good seat memory function - also in the back.
iDrive was developed by a crazed monk in Transylvania. My wife's favorite comment: "Please go out and set the route for x." Keyless "design" makes it more difficult and time consuming to start than with an ordinary key.