Recently moved up from an 06 330i.
Really like the ride and quiet of the new 528 but does not handle as well as 3 series.
Excellent highway car and still good in the curves but some of the sportiness is gone as a tradeoff for comfort.
Interiior ergonomics, mileage, ride and low noise level.
Trunk is much roomier than 3 series.
Bring back a bit more of the handling of the 3; Transmission shifter and elect. parking brake took some time to feel comfortable.