Sporty and comfortable roadster with great build quality and materials. Seats are amazing and power is very good on the 4 cylinder model. The hardtop takes kind of a long time to put up and down and draws a lot of attention so not as quick as a softtop but it's much more secure and gives the car a nice dual personality with the top up vs down. Rearward visibility is among the best i've seen with minimal blind spots and great mirrors that auto dim at night. The 6 speed manual is slick and easy to easy to use and makes it feel like a proper sports car. Rev matching is easy and the engine is torquey and willing at almost any RPM The standard run-flat tires are too hard and non-forgiving and make for a terrible ride especially with the M package suspension and larger wheels. I recommend swapping them out for non run-flats and sticking to 17 or 18 inch wheels. The car looks and is small from the outside but feels larger and very substantial from the inside. It's probably at least 300lbs overweight though. Even though it has great power and decent fuel economy, this car would really benefit from losing a few pounds. As is it's more of a comfortable, fast highway cruiser then a tight-curve hugging car that you can fling around. This would be a seriously great car if it lost a few pounds but it's still an enjoyable and classy vehicle.
Just purchased my 2015 Z4 s35i Alpine White with Red leather interior. The car was Certified with only 2,348 miles. I owned a 2004 Z4 in 2008 and really liked the ride. I sold the Z4 and purchased a 2006 Corvette convertible. It was a nice car with a lot of power but was lacking in the ride. I was looking for either a Z4 or Mercedes SLK. The Z4 was just what I was looking for, exec driven and was totally loaded with all the bells and whistles. It is extremely quiet and rides like a dream. However, there are two cons: trunk space is limited with top down, and gas mileage is around 24 mpg, less than my 400 hp vette. But all-in-all, it is still the ultimate driving machine.