Bought my Z3 in December 2009 - have owned it for 8 months. Love the styling, performance, ride & handling. Purchased extended warranty & glad I did. It has already paid for itself. Issue with emissions, front bushings & ball joints, motor mount replaced, 1 window lift, fan clutch, alt tensioner, & water pump. All this would have cost $4500 - only $500 with warr. Key remote has been flaky - will not fail when at dealership. Having said that - it always starts and I drive it every day on my 70 mile commute. Love the car, gets lots of comments - a real head turner. Getting close to 25 mpg with mostly highway driving, some local (80/20).
On board computer - mpg, miles to empty, ave speed & outside temp. Interior and exterior styling is excellent. AC works well even in Arizona heat.
Higher quality plastic for rear window (foggy/scratched and will not clean) or use glass. Larger trunk would be nice - golf clubs do not fit. Would like better sounding sound system. Muddy base. More sound amp power would help and improved speakers.