My interpretation on the Z4 car reviews is a little different. My viewpoint is from a autocross/track perspective, which is what I want to do with the car.
http://motortrend.com/roadtests/coupe/112_0408_sportconv/index13.html
Fine handling? Yes, it does have fine handling - look at Motor Trend's skidpad, slalom and figure 8 results. Those are the measures of fine handling, not some reviewer's subjective comment "I couldn't feel the road." or "Perplexed by nervous steering." The Z4 was 2nd, and just barely 2nd, to the Boxster S. Coming in 2nd to only Porsche isn't anything to be ashamed of.
Yes, the ride is harsh, or stiff, and that's what contributes to the handling qualities. Smooth ride and handling are opposites. If someone is looking for a comfortable street cruiser, the Z4 probably is not the car. If you are looking for a top notch handling car, it's at the top of the list in the price range.
Also, BMW did put run flat tires on it as standard, which I do think is STUPID. That does make a stiffer ride. Several reviewers put performance tires on it and the ride got better. But rumor has it all BMWs will be shipping with run-flats in the future. It should be an option.
Motor Trend:
By now, you either love or hate the Z4's creased and crashed styling. I'm in the love-it boat, and this is due in part to the bond I've made with the car's character. The Z4's long nose alludes to the wondrous straight-six under the bonnet. This smooth, linear engine shines in all applications, but is most at home spinning a six-speed manual and mounted in this light and nimble roadster.
The solid chassis and precise steering also contribute to the BMW's pure-bred feel. All this and the top-notch interior craftsmanship has convinced me the BMW deserves the gold medal at this track meet.
--Brian Vance