I traded in my 740iL for something a little smaller and more fun to drive and was not disappointed. I have been driving BMW since the early 90s and have had nothing but positive experiences with them all. I started in Europe where the BMW is at home on the autobahn then moved here to the States. The Z4 is quick and nimble, and though I chose the smaller 2.5 it has more than enough power to get things moving. Mileage is great for the power it has. The engine is typical BMW, VERY smooth and quiet. Trunk space is large for the class but interior storage is lacking. I have the sport suspension which is, at times, stiff enough to jar you when large bumps are found. Handling is great.
Top down through the twisties. Perfect motor response. Nice sounds. Wonderful styling.
Better visibility with the top up. More interior storage.