The Z4 has exceeded my expectations. It is fun to drive and goes where you point it. The quality of workmanship is evident clearly in every respect. It is quiet, with wind noise the largest sound factor. Even the gas mileage is better than I had expected. A small negative is that the display is a bit hard to see in bright daylight with the top down. It is hard to graceful when entering and exiting the car. This is common with roadsters. With the top in place there is a feeling of spaciousness. The trunk is big enough for traveling. Worth the price.
The engine is smooth and the transmission is so good that I hardly use the manual shift feature. It is a beautiful machine. The AC/heater is excellent. The stereo is excellent. The seats are comfortable as well.
A proximity device fore and aft would help. The car is so low that it can easily hit those parking stops. A proximity device would help to keep from hitting them when parking.