Bought from dealer with 5000 miles on it.
Also, had a Z3.
The style of the Z4 is not as nice as the Z3 but many features of the Z4 are an improvement.
Smooth with plenty of power.
I am 6'2" and , unlike many two seaters, has good room for the driver.
Expensive to maintain, but I only drive it on sunny days with the top down.
Just hit 20,000 miles.
Red color and gets lots of compliments.
I am satisfied.
Power, trunk space, leg room.
Don't like electric steering.
Not a fan of run flat tires.