Personally, the BMW Z4 exterior design is amazing. It looks smooth and appealing. In my own experience, it was very comfortable to sit in. Performance is very smooth and has great fuel economy. The interior design looks very organized and in place. The technology (heat, lights, radio etc.) and other switches are easily accessible. After a year of driving with this car, I found it very reliable. It can run in all weather fairly well. The fuel economy is just outstanding.