I have had both Bridgestone stock RE40 and S3 Pole positions tires w/ numerous alignements and IMHO they both feather/such with the Z.
My current tires are BF Goodrich g-Force and not only are they cheaper, have better traction, but also seem to last longer.

 

The thing that I have found is that the Z doesn't hold an alignment very good. You really need to get the alignment checked every 6 to 12 months.

As Cat points out - to use the old phrase - your actual mileage may vary. I've seen people post that they've torn them up in less than 10K miles and other claim to go 40-50K miles.

 

Correct, except you have to add repeat!

Buy new tires. Get an alignment. Repeat!