Excerpt: The P Zero came OE on my M3. So far wear has been decent, given a track day was thrown in there. They did get noisy for a while after the track day, but seem to be settling back in now (they did have some mild feathering on the tread edges after a day of abuse - I rotated side to side afterward.).
Summary: Volvo S60 R(AWD) - 235/40-18 - Will never buy these tires again. In 2004 and 2006, in two separate moderate-speed impact incidents (one with a manhole and the other with a steel construction plate), the left front tire developed a bulge.
Summary: Jag X-Type Sport - 225/40 - 18 - Superb handling and traction - wet or dry. Grips and simply doesn't let go! No noticeable sloppiness from sidewalls. Thumps significantly over ridges on asphalt. Absolutely USELESS in cold when there is even a hint of snow! Get 'em off!