"Alright so here's how it goes. Mine is the 3.0i with the SMG transmission. At first I was against it because I've driven nothing else than a manual my entire life. I was most impressed and if at all possible I will always opt for the SMG. I know some reviewers say that in town driving with an SMG is choppy and weird, but all it really comes down to is making sure you manually downshift (the car automatically downshifts as you slow down, though I feel its a little behind) with the paddles and never shift to 1st until you are completely stopped. I have absolutely no qualms with it.
As far as gas mileage goes. In town driving I get about (and this is moderately aggressive driving) 22-24 mpg. On the interstate at an average speed of 75-80 MPH I get 33-34 MPG. And best of all, when I'm on the highway traveling between 55-60 MPH I get 37-38 MPG. Its fantastic and worth every penny.
Now as far as buying one, I suggest getting every option possible because it makes the car feel the way BMW designed it to be. I have the premium package, sports package, convenience package, navigation, and M sport seats. Nothing here is left to be desired, and thats the way it should be.
I would reccomend buying a CPO vehicle as well (certified pre-owned). It comes with the exact same warranty as the original factory warranty as well as some other options you can purchase.
I personally bought a CPO vehicle and love it everyday. The only thing I have to pay for for the next 4 years is gas and insurance.
-All maintenance is free
-Oil and oil changes are free
-EVEN THE WIPER BLADES ARE FREE!!!
All of this for 4 years. Absolutely great. Its why I'll be a return customer. BMW treats you like you're the big shot.
Cons: "bad cupholders, small trunk space, visibility"
Likely to recommend this car? (1-10): 10
"For a sports car (roadster or otherwise) it's a great little car with lots of leg room. The cabin is surprisingly quiet and the sound system (Premium Sound) is really good even with the top down. I got this CPO and the previous owners kept it in top shape. Handling is amazing (I had an MR2 which had great go-cart handling -- the Z is just as much fun) and acceleration is awesome. The build quality is smart and classy, as we expect from BMW. Most important, this car puts a smile on my face every time I take a ride. And when I'm not driving it, I think about taking it for a ride all the time -- can't wait for the next opportunity to put the top down and hit the road. If my Toyota commuter is a wife, the Z4 is definitely a mistress that will make other men jealous."
"I can't say enough about this sports car. I've owned mine for 3+ years and it still makes my heart race when I see it. It's "The ultimate driving machine". I highly recommend the 3.0. Drive them both and you will definitely feel the difference in power.
I'd like to mention safety. I was t-boned on the driver side by someone going 45+ mph. The entire length of the car was smashed, but the interior (and myself) were untouched due to the steel safety bar around the car. Everyone who saw it, including the police, told me that any other 2-seater and I would have been crushed. Thank you BMW. I love my Z4!!"